* Write the terms of a sequence defined by an explicit formula.
* Write the terms of a sequence defined by a recursive formula.
* Use factorial notation.
* Find the common difference for an arithmetic sequence.
* Write terms of an arithmetic sequence.
* Use a recursive formula for an arithmetic sequence.
* Use an explicit formula for an arithmetic sequence.
* Evaluate square roots.
* Use the product rule to simplify square roots.
* Use the quotient rule to simplify square roots.
* Add and subtract square roots.
* Rationalize denominators.
* Use rational roots.
* Use summation notation.
* Use the formula for the sum of the first n terms of an arithmetic series.
* Use the formula for the sum of the first n terms of a geometric series.
* Use the formula for the sum of an infinite geometric series.
* Solve annuity problems.
Find the nth term of a sequence
Find the index of a given term of a sequence
Given a geometric series, be able to calculate the nth partial sum
Identify a geometric series as convergent or divergent.
* Find the common difference for an arithmetic sequence.
* Write terms of an arithmetic sequence.
* Use a recursive formula for an arithmetic sequence.
* Use an explicit formula for an arithmetic sequence.
* Evaluate square roots.
* Use the product rule to simplify square roots.
* Use the quotient rule to simplify square roots.
* Add and subtract square roots.
* Rationalize denominators.
* Use rational roots.
* Use summation notation.
* Use the formula for the sum of the first n terms of an arithmetic series.
* Use the formula for the sum of the first n terms of a geometric series.
* Use the formula for the sum of an infinite geometric series.
* Solve annuity problems.
Find the nth term of a sequence
Find the index of a given term of a sequence
Given a geometric series, be able to calculate the nth partial sum
Identify a geometric series as convergent or divergent.
* Solve polynomial equations by factoring
* Solve equations with radicals and check the solutions
* Solve equations with rational exponents
* Solve equations that are quadratic in form
* Solve absolute value equations
* Factor the greatest common factor of a polynomial.
* Factor a trinomial.
* Factor by grouping.
* Factor a perfect square trinomial.
* Factor a difference of squares.
* Factor the sum and difference of cubes.
* Factor expressions using fractional or negative exponents.
* Classify a real number as a natural, whole, integer, rational, or irrational number.
* Perform calculations using order of operations.
* Use the following properties of real numbers: commutative, associative, distributive, inverse, and identity.
* Evaluate algebraic expressions.
* Simplify algebraic expressions.
* Solve equations involving rational exponents
* Solve equations using factoring
* Solve equations with radicals and check the solutions
* Solve absolute value equations
* Solve other types of equations
* Model exponential growth and decay
* Use Newton's Law of Cooling
* Use logistic-growth models
* Choose an appropriate model for data
* Express an exponential model in base e
* Construct perpendicular and angle bisectors
* Use bisectors to solve problems
* Identify the circumcenter and incenter of a triangle
* Use triangle segments to solve problems
* Solve polynomial equations by factoring
* Solve equations with radicals and check the solutions
* Solve equations with rational exponents
* Solve equations that are quadratic in form
* Solve absolute value equations
* Factor the greatest common factor of a polynomial.
* Factor a trinomial.
* Factor by grouping.
* Factor a perfect square trinomial.
* Factor a difference of squares.
* Factor the sum and difference of cubes.
* Factor expressions using fractional or negative exponents.
* Classify a real number as a natural, whole, integer, rational, or irrational number.
* Perform calculations using order of operations.
* Use the following properties of real numbers: commutative, associative, distributive, inverse, and identity.
* Evaluate algebraic expressions.
* Simplify algebraic expressions.
* Solve equations involving rational exponents
* Solve equations using factoring
* Solve equations with radicals and check the solutions
* Solve absolute value equations
* Solve other types of equations
* Model exponential growth and decay
* Use Newton's Law of Cooling
* Use logistic-growth models
* Choose an appropriate model for data
* Express an exponential model in base e
* Construct perpendicular and angle bisectors
* Use bisectors to solve problems
* Identify the circumcenter and incenter of a triangle
* Use triangle segments to solve problems
* Identify, write, and analyze conditional statements
* Write the inverse, converse, and contrapositive of a conditional statement
* Write a counterexample to a fake conjecture
* Find the distance between two points
* Find the midpoint of two given points
* Find the coordinates of an endpoint given one endpoint and a midpoint
* Find the coordinates of a point a fractional distance from one end of a segment
* Connect functions to their graphs
* Graph piecewise-defined functions
* Graph absolute value functions
* Graph greatest-integer functions
* Interpret graphs
* Use the vertical line test to determine a function
* Connect functions to their graphs
* Graph piecewise-defined functions
* Graph absolute value functions
* Graph greatest-integer functions
* Interpret graphs
* Use the vertical line test to determine a function
* Introduce functions and function notation
* Develop skills in constructing and interpreting the graphs of functions
* Learn to apply this knowledge in a variety of situations
* Recognize graphs of common functions.
* Graph functions using vertical and horizontal shifts.
* Graph functions using reflections about the x-axis and the y-axis.
* Graph functions using compressions and stretches.
* Combine transformations.
* Identify intervals on which a function increases, decreases, or is constant
* Use graphs to locate relative maxima or minima
* Test for symmetry
* Identify even or odd functions and recognize their symmetries
* Understand and use piecewise functions
* Determine whether a relation or an equation represents a function.
* Evaluate a function.
* Use the vertical line test to identify functions.
* Identify the domain and range of a function from its graph
* Identify intercepts from a function’s graph
* Solve counting problems using the Addition Principle.
* Solve counting problems using the Multiplication Principle.
* Solve counting problems using permutations involving n distinct objects.
* Solve counting problems using combinations.
* Find the number of subsets of a given set.
* Solve counting problems using permutations involving n non-distinct objects.
* Find the common ratio for a geometric sequence.
* List the terms of a geometric sequence.
* Use a recursive formula for a geometric sequence.
* Use an explicit formula for a geometric sequence.
* Identify characteristics of each type of conic section
* Identify a conic section from its equation in general form
* Identifying the eccentricities of each type of conic section
* Graph parabolas with vertices at the origin.
* Write equations of parabolas in standard form.
* Graph parabolas with vertices not at the origin.
* Solve applied problems involving parabolas.
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Personal development courses are widely available today, with each one promising life-changing outcomes. Tim Han’s Life Mastery Achievers (LMA) Course has drawn a lot of interest. In addition to offering my frank assessment of Success Insider’s LMA Course, this piece examines the course’s effects via a variety of Tim Han LMA course reviews and Success Insider comments.
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The French Revolution, which began in 1789, was a period of radical social and political upheaval in France. It marked the decline of absolute monarchies, the rise of secular and democratic republics, and the eventual rise of Napoleon Bonaparte. This revolutionary period is crucial in understanding the transition from feudalism to modernity in Europe.
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June 3, 2024 Anti-Semitism Letter Sent to MIT President Kornbluth and MIT Cor...Levi Shapiro
Letter from the Congress of the United States regarding Anti-Semitism sent June 3rd to MIT President Sally Kornbluth, MIT Corp Chair, Mark Gorenberg
Dear Dr. Kornbluth and Mr. Gorenberg,
The US House of Representatives is deeply concerned by ongoing and pervasive acts of antisemitic
harassment and intimidation at the Massachusetts Institute of Technology (MIT). Failing to act decisively to ensure a safe learning environment for all students would be a grave dereliction of your responsibilities as President of MIT and Chair of the MIT Corporation.
This Congress will not stand idly by and allow an environment hostile to Jewish students to persist. The House believes that your institution is in violation of Title VI of the Civil Rights Act, and the inability or
unwillingness to rectify this violation through action requires accountability.
Postsecondary education is a unique opportunity for students to learn and have their ideas and beliefs challenged. However, universities receiving hundreds of millions of federal funds annually have denied
students that opportunity and have been hijacked to become venues for the promotion of terrorism, antisemitic harassment and intimidation, unlawful encampments, and in some cases, assaults and riots.
The House of Representatives will not countenance the use of federal funds to indoctrinate students into hateful, antisemitic, anti-American supporters of terrorism. Investigations into campus antisemitism by the Committee on Education and the Workforce and the Committee on Ways and Means have been expanded into a Congress-wide probe across all relevant jurisdictions to address this national crisis. The undersigned Committees will conduct oversight into the use of federal funds at MIT and its learning environment under authorities granted to each Committee.
• The Committee on Education and the Workforce has been investigating your institution since December 7, 2023. The Committee has broad jurisdiction over postsecondary education, including its compliance with Title VI of the Civil Rights Act, campus safety concerns over disruptions to the learning environment, and the awarding of federal student aid under the Higher Education Act.
• The Committee on Oversight and Accountability is investigating the sources of funding and other support flowing to groups espousing pro-Hamas propaganda and engaged in antisemitic harassment and intimidation of students. The Committee on Oversight and Accountability is the principal oversight committee of the US House of Representatives and has broad authority to investigate “any matter” at “any time” under House Rule X.
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Operation “Blue Star” is the only event in the history of Independent India where the state went into war with its own people. Even after about 40 years it is not clear if it was culmination of states anger over people of the region, a political game of power or start of dictatorial chapter in the democratic setup.
The people of Punjab felt alienated from main stream due to denial of their just demands during a long democratic struggle since independence. As it happen all over the word, it led to militant struggle with great loss of lives of military, police and civilian personnel. Killing of Indira Gandhi and massacre of innocent Sikhs in Delhi and other India cities was also associated with this movement.
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1. 9.1 Sequences and Notations
Chapter 9 Sequences, Probability, and Counting
Theory
2. Concepts & Objectives
⚫ The objectives for this section are
⚫ Write the terms of a sequence defined by an explicit
formula.
⚫ Write the terms of a sequence defined by a recursive
formula.
⚫ Use factorial notation
3. Sequences
⚫ A sequence is a function whose domain is the set of
natural numbers () (the term numbers), and whose
range is the set of term values.
Examples: Find a next term for the following:
A. 3, 10, 17, 24, 31, …
B. 3, 6, 12, 24, 48, …
4. Sequences
⚫ A sequence is a function whose domain is the set of
natural numbers () (the term numbers), and whose
range is the set of term values.
Examples: Find a next term for the following:
A. 3, 10, 17, 24, 31, …
38 (add 7)
B. 3, 6, 12, 24, 48, …
96 (multiply by 2)
5. Sequences (cont.)
⚫ Instead of using f(x) notation to indicate a sequence, it is
customary to use an, where . The letter n is
used instead of x as a reminder that n represents a
natural (counting) number. This is called an explicit
formula.
⚫ The elements in the range of a sequence, called the
terms of the sequence, are . The first term
is found by letting n = 1, the second term is found by
letting n = 2, and so on. The general term, or the nth
term, of the sequence is an.
( )
n
a f n
=
1 2 3
, , , ...
a a a
6. Sequences (cont.)
⚫ You can use Desmos to list the term in a sequence:
⚫ Type the sequence function into Desmos as a
function, f(n).
⚫ Add a table.
⚫ Change the x1 to n1 and y1 to f(n1).
⚫ Enter 1 for n1. When you hit the Enter key, it will fill
in the value for f(n1). Enter 2, and press the Enter key
again, and it will start to populate the list for you.
7. Sequences (cont.)
⚫ Example: Write the first five terms of the sequence.
Step 1: Enter the sequence into Desmos as a function.
1
2
n
n
a
n
+
=
+
(Notice that I
used parentheses
so that Desmos
would divide the
right expression.)
8. Sequences (cont.)
⚫ Example: Write the first five terms of the sequence.
Step 2: Add a table by clicking on the “+” button.
1
2
n
n
a
n
+
=
+
9. Sequences (cont.)
⚫ Example: Write the first five terms of the sequence.
Step 3: Change the x and y.
1
2
n
n
a
n
+
=
+
10. Sequences (cont.)
⚫ Example: Write the first five terms of the sequence.
Step 4: Enter 1-5 for n.
1
2
n
n
a
n
+
=
+
There’re our answers:
a1 = 0.67
a2 = 0.75
a3 = 0.8
a4 = 0.83
a5 = 0.86
11. Piecewise Explicit Formulas
⚫ Generally, sequences are functions whose domain is
over the positive integers. This is true for other types of
functions as well, including some piecewise functions.
(Recall that a piecewise function is a function defined by
multiple subsections.)
⚫ Example: Write the first six terms of the sequence.
=
2
if is not divisible by 3
if is divisible by 3
3
n
n n
a n
n
12. Piecewise Explicit Formulas
⚫ Example: Write the first six terms of the sequence:
=
2
if is not divisible by 3
if is divisible by 3
3
n
n n
a n
n
n = 1 1 is not divisible by 3 a1 = 12 = 1
n = 2 2 is not divisible by 3 a2 = 22 = 4
n = 3 3 is divisible by 3 a3 = 33 = 1
n = 4 4 is not divisible by 3 a4 = 42 = 16
n = 5 5 is not divisible by 3 a5 = 52 = 25
n = 6 6 is divisible by 3 a6 = 63 = 2
1, 4, 1, 16, 25, 2
13. Writing an Explicit Formula
⚫ Thus far, we have been given the explicit formula and
asked to find a number of terms of the sequence.
Sometimes, the explicit formula for the nth term of a
sequence is not given, and instead, we are given several
terms from the sequence.
⚫ When this happens, we can work in reverse to find an
explicit formula from the first few terms of a sequence.
The key to finding an explicit formula is to look for a
pattern in the terms.
14. Writing an Explicit Formula
⚫ Example: Write an explicit formula for the nth term.
a)
2 3 4 5 6
, , , , ,
11 13 15 17 19
− − −
15. Writing an Explicit Formula
⚫ Example: Write an explicit formula for the nth term.
a)
The terms alternate between positive and negative, so
we can use (‒1)n to make the terms alternate. The
numerator can be represented by n+1.
The denominator is a little trickier, since we need them
to start with 11 and add 2 each time.
2 3 4 5 6
, , , , ,
11 13 15 17 19
− − −
16. Writing an Explicit Formula
⚫ Example: Write an explicit formula for the nth term.
a)
The denominator is a little trickier, since we need it to
start with 11 and add 2 each time.
So, our formula is
2 3 4 5 6
, , , , ,
11 13 15 17 19
− − −
( )
2 1 ? 11 2 9
n
+ = +
( ) ( )
1 1
2 9
n
n
n
a
n
− +
=
+
17. Writing an Explicit Formula
⚫ Example: Write an explicit formula for the nth term.
b)
2 2 2 2 2
, , , , ,
25 125 625 3,125 15,625
− − − − −
18. Writing an Explicit Formula
⚫ Example: Write an explicit formula for the nth term.
b)
Notice that the terms are all negative and the
numerator is 2.
We can re-write the denominators as power of 5:
2 2 2 2 2
, , , , ,
25 125 625 3,125 15,625
− − − − −
2 3 4 5 6
2 2 2 2 2
, , , , ,
5 5 5 5 5
− − − − −
19. Writing an Explicit Formula
⚫ Example: Write an explicit formula for the nth term.
b)
We can re-write the denominators as power of 5:
So, our formula is
2 2 2 2 2
, , , , ,
25 125 625 3,125 15,625
− − − − −
2 3 4 5 6
2 2 2 2 2
, , , , ,
5 5 5 5 5
− − − − −
1
2
5
n n
a +
= −
20. Recursive Formulas
⚫ Some formulas cannot easily be written using an explicit
formula, but instead depend on the previous terms. The
Fibonacci sequence is an example of this, where the term
is the sum of the previous two terms.
⚫ A formula that defines the terms of a sequence using
previous terms is called a recursive sequence.
⚫ A recursive formula always has two parts: the value of
an initial term(s), and an equation defining an in terms of
preceding terms.
21. Recursive Formulas (cont.)
⚫ Example: Suppose we know the following:
We can find the subsequent terms of the sequence
using the first term.
1
1
3
2 1 for 2
n n
a
a a n
−
=
= −
a1 = 3
a2 = 2a1 ‒ 1 = 2(3) ‒ 1 = 5
a3 = 2a2 ‒ 1 = 2(5) ‒ 1 = 9
a4 = 2a3 ‒ 1 = 2(9) ‒ 1 = 17
3, 5, 9, 17
22. Factorial Notation
⚫ An example of a recursive sequence is the product of
consecutive positive integers, called a factorial. n
factorial, written as n!, is the product of the positive
integers from 1 to n.
⚫ For example,
⚫ This is formally written as
⚫ (0! is a special case, and is defined to be 1)
4! 4 3 2 1 24
= =
( )( ) ( )( )
0! 1
1! 1
! 1 2 2 1 , for 2
n n n n n
=
=
= − −
24. Factorial Notation (cont.)
⚫ Factorials get large very quickly – faster than even
exponential functions. Depending on the function, the
output may get too large for the calculator.