Rational numbers can be expressed as fractions with integer numerators and denominators. Irrational numbers cannot be expressed as fractions and instead have non-repeating decimal representations. The document proves that sqrt(2) is irrational by assuming it is rational, then showing this leads to a contradiction since the numerator and denominator would have a common factor.
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The Art Pastor's Guide to Sabbath | Steve ThomasonSteve Thomason
What is the purpose of the Sabbath Law in the Torah. It is interesting to compare how the context of the law shifts from Exodus to Deuteronomy. Who gets to rest, and why?
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The map views are useful for providing a geographical representation of data. They allow users to visualize and analyze the data in a more intuitive manner.
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.
For more information, visit-www.vavaclasses.com
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2. Rational Numbers
a
Rational numbers can be expressed in the form where a and
b are integers. b
3. Rational Numbers
a
Rational numbers can be expressed in the form where a and
b are integers. b
Irrational Numbers
4. Rational Numbers
a
Rational numbers can be expressed in the form where a and
b are integers. b
Irrational Numbers
Irrational numbers are numbers which are not rational.
All irrational numbers can be expressed as a unique infinite
decimal.
6. e.g . Prove 2 is irrational
“Proof by contradiction”
7. e.g . Prove 2 is irrational
“Proof by contradiction”
Assume 2 is rational
8. e.g . Prove 2 is irrational
“Proof by contradiction”
Assume 2 is rational
a
2 where a and b are integers with no common factors
b
9. e.g . Prove 2 is irrational
“Proof by contradiction”
Assume 2 is rational
a
2 where a and b are integers with no common factors
b
b 2a
10. e.g . Prove 2 is irrational
“Proof by contradiction”
Assume 2 is rational
a
2 where a and b are integers with no common factors
b
b 2a
2b 2 a 2
11. e.g . Prove 2 is irrational
“Proof by contradiction”
Assume 2 is rational
a
2 where a and b are integers with no common factors
b
b 2a
2b 2 a 2
Thus a 2 must be divisible by 2
12. e.g . Prove 2 is irrational
“Proof by contradiction”
Assume 2 is rational
a
2 where a and b are integers with no common factors
b
b 2a
2b 2 a 2
Thus a 2 must be divisible by 2
Any square that is divisible by 2 is divisible by 4
13. e.g . Prove 2 is irrational
“Proof by contradiction”
Assume 2 is rational
a
2 where a and b are integers with no common factors
b
b 2a
2b 2 a 2
Thus a 2 must be divisible by 2
Any square that is divisible by 2 is divisible by 4
Thus a 2 must be divisible by 4
14. e.g . Prove 2 is irrational
“Proof by contradiction”
Assume 2 is rational
a
2 where a and b are integers with no common factors
b
b 2a
2b 2 a 2
Thus a 2 must be divisible by 2
Any square that is divisible by 2 is divisible by 4
Thus a 2 must be divisible by 4
2b 2 4k where k is an integer
15. e.g . Prove 2 is irrational
“Proof by contradiction”
Assume 2 is rational
a
2 where a and b are integers with no common factors
b
b 2a
2b 2 a 2
Thus a 2 must be divisible by 2
Any square that is divisible by 2 is divisible by 4
Thus a 2 must be divisible by 4
2b 2 4k where k is an integer
b 2 2k
16. e.g . Prove 2 is irrational
“Proof by contradiction”
Assume 2 is rational
a
2 where a and b are integers with no common factors
b
b 2a
2b 2 a 2
Thus a 2 must be divisible by 2
Any square that is divisible by 2 is divisible by 4
Thus a 2 must be divisible by 4
2b 2 4k where k is an integer
b 2 2k
So a 2 and b 2 are both divisible by 2 and must have a common factor
17. e.g . Prove 2 is irrational
“Proof by contradiction”
Assume 2 is rational
a
2 where a and b are integers with no common factors
b
b 2a
2b 2 a 2
Thus a 2 must be divisible by 2
Any square that is divisible by 2 is divisible by 4
Thus a 2 must be divisible by 4
2b 2 4k where k is an integer
b 2 2k
So a 2 and b 2 are both divisible by 2 and must have a common factor
However, a and b have no common factors
18. e.g . Prove 2 is irrational
“Proof by contradiction”
Assume 2 is rational
a
2 where a and b are integers with no common factors
b
b 2a
2b 2 a 2
Thus a 2 must be divisible by 2
Any square that is divisible by 2 is divisible by 4
Thus a 2 must be divisible by 4
2b 2 4k where k is an integer
b 2 2k
So a 2 and b 2 are both divisible by 2 and must have a common factor
However, a and b have no common factors
so 2 is not rational
19. e.g . Prove 2 is irrational
“Proof by contradiction”
Assume 2 is rational
a
2 where a and b are integers with no common factors
b
b 2a
2b 2 a 2
Thus a 2 must be divisible by 2
Any square that is divisible by 2 is divisible by 4
Thus a 2 must be divisible by 4
2b 2 4k where k is an integer
b 2 2k
So a 2 and b 2 are both divisible by 2 and must have a common factor
However, a and b have no common factors
so 2 is not rational
2 is irrational
20. e.g . Prove 2 is irrational
“Proof by contradiction”
Assume 2 is rational
a
2 where a and b are integers with no common factors
b
b 2a
2b 2 a 2
Thus a 2 must be divisible by 2
Any square that is divisible by 2 is divisible by 4
Thus a 2 must be divisible by 4
2b 2 4k where k is an integer
b 2 2k
So a 2 and b 2 are both divisible by 2 and must have a common factor
However, a and b have no common factors
so 2 is not rational
2 is irrational Exercise 2B; 2a, 3, 4 (root 3), 8, 14*