This document provides information about exponential functions. It defines the exponential function as f(x) = bx where b > 0 and b ≠ 1. It discusses graphing and evaluating exponential functions. It also covers solving exponential equations and inequalities. Examples are provided to illustrate defining domains and ranges, as well as solving specific exponential equations and inequalities.
Properties of parallelogram applies to rectangles, rhombi and squares.
In a parallelogram,
Opposite sides of a parallelogram are parallel.
A diagonal of a parallelogram divides it into two congruent triangles.
Opposite sides of a parallelogram are congruent.
Opposite angles of a parallelogram are congruent.
If one angle of a parallelogram is right, then all the angles are right.
Consecutive angles of a parallelogram are supplementary.
Diagonals of a parallelogram bisect each other.
https://www.youtube.com/channel/UCOuMfD4sggCh7XeiAHlus6Q
Order of presentation
Anushka - Opening
Nikunj -Intro
Shubham - Graphical
Amel - Sunstitution
Siddhartha- Elimination
Karthik - Cross multiplication
Anushka - Equations reducible...& wrap-up
In case of any confusion..inform me by facebook, phone or in school
Hello everyone! I hope this short powerpoint presentation can help you in understanding quadratic formula, especially for those students that are having hard time to cope up in this topic.
Properties of parallelogram applies to rectangles, rhombi and squares.
In a parallelogram,
Opposite sides of a parallelogram are parallel.
A diagonal of a parallelogram divides it into two congruent triangles.
Opposite sides of a parallelogram are congruent.
Opposite angles of a parallelogram are congruent.
If one angle of a parallelogram is right, then all the angles are right.
Consecutive angles of a parallelogram are supplementary.
Diagonals of a parallelogram bisect each other.
https://www.youtube.com/channel/UCOuMfD4sggCh7XeiAHlus6Q
Order of presentation
Anushka - Opening
Nikunj -Intro
Shubham - Graphical
Amel - Sunstitution
Siddhartha- Elimination
Karthik - Cross multiplication
Anushka - Equations reducible...& wrap-up
In case of any confusion..inform me by facebook, phone or in school
Hello everyone! I hope this short powerpoint presentation can help you in understanding quadratic formula, especially for those students that are having hard time to cope up in this topic.
Unlock a deep understanding of mathematics with our Module and Summary! Clear definitions, comprehensive discussions, relevant example problems, and step-by-step solutions will guide you through mathematical concepts effortlessly. Learn with a systematic approach and discover the magic in every step of your learning journey. Mathematics doesn't have to be complicated—let's make it simple and enjoyable!
Read| The latest issue of The Challenger is here! We are thrilled to announce that our school paper has qualified for the NATIONAL SCHOOLS PRESS CONFERENCE (NSPC) 2024. Thank you for your unwavering support and trust. Dive into the stories that made us stand out!
Exploiting Artificial Intelligence for Empowering Researchers and Faculty, In...Dr. Vinod Kumar Kanvaria
Exploiting Artificial Intelligence for Empowering Researchers and Faculty,
International FDP on Fundamentals of Research in Social Sciences
at Integral University, Lucknow, 06.06.2024
By Dr. Vinod Kumar Kanvaria
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Francesca Gottschalk from the OECD’s Centre for Educational Research and Innovation presents at the Ask an Expert Webinar: How can education support child empowerment?
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Synthetic Fiber Construction in lab .pptxPavel ( NSTU)
Synthetic fiber production is a fascinating and complex field that blends chemistry, engineering, and environmental science. By understanding these aspects, students can gain a comprehensive view of synthetic fiber production, its impact on society and the environment, and the potential for future innovations. Synthetic fibers play a crucial role in modern society, impacting various aspects of daily life, industry, and the environment. ynthetic fibers are integral to modern life, offering a range of benefits from cost-effectiveness and versatility to innovative applications and performance characteristics. While they pose environmental challenges, ongoing research and development aim to create more sustainable and eco-friendly alternatives. Understanding the importance of synthetic fibers helps in appreciating their role in the economy, industry, and daily life, while also emphasizing the need for sustainable practices and innovation.
3. C R E E M O S E N L A E X I G E N C I A
C U R S O D E Á L G E B R A
𝐷𝑒𝑓𝑖𝑛𝑖𝑟 𝑦 𝑔𝑟𝑎𝑓𝑖𝑐𝑎𝑟
𝑙𝑎𝑠 𝑓𝑢𝑛𝑐𝑖𝑜𝑛𝑒𝑠
𝑒𝑥𝑝𝑜𝑛𝑒𝑛𝑐𝑖𝑎𝑙𝑒𝑠
𝑅𝑒𝑠𝑜𝑙𝑣𝑒𝑟 𝑒𝑐𝑢𝑎𝑐𝑖𝑜𝑛𝑒𝑠
𝑒𝑥𝑝𝑜𝑛𝑒𝑛𝑐𝑖𝑎𝑙𝑒𝑠
𝑅𝑒𝑠𝑜𝑙𝑣𝑒𝑟 𝑖𝑛𝑒𝑐𝑢𝑎𝑐𝑖𝑜𝑛𝑒𝑠
𝑒𝑥𝑝𝑜𝑛𝑒𝑛𝑐𝑖𝑎𝑙𝑒𝑠
4. C R E E M O S E N L A E X I G E N C I A
C U R S O D E Á L G E B R A
Función exponencial
A lo largo de la historia, los matemáticos se mostraron
fascinados por la forma que adoptaba una cuerda o
cadena que se combaba bajo su propio peso e
intentaron descubrir cual era la curva que la describía.
La resolución del problema no era nada fácil, un
hombre de la talla intelectual de Galileo erró en su
solución puesto que en 1638 publicó, en sus Diálogos
sobre dos nuevas ciencias, que la cadena asumiría la
forma de una parábola.
𝒚 = 𝒂 𝒆𝒃𝒙
+ 𝒆−𝒃𝒙
La curva descrita es llamada catenaria.
5. C R E E M O S E N L A E X I G E N C I A
Función exponencial
C U R S O D E Á L G E B R A
Si b > 0 y b ≠ 1, entonces la función exponencial se
define como:
𝑓𝑥 = 𝑏𝑥
Dom𝑓=ℝ ∧ Ran𝑓 = ℝ+
Ejemplo:
𝑓𝑥 = 2𝑥
; 𝑥 ∈ ℝ
Tabularemos algunos puntos para inducir la gráfica
𝑥 𝑦
3 8
2 4
1 2
0 1
−2 Τ
1 4
−1 Τ
1 2
𝑦
𝑥
1
2
1
4
8
2 3
−1
−2
Ejemplo:
Tabularemos algunos puntos para inducir la gráfica
𝑓𝑥 =
1
2
𝑥
; 𝑥 ∈ ℝ
𝑥 𝑦
−3 8
2
4
1
2
0 1
−2
Τ
1 4
−1
Τ
1 2
𝑦
𝑥
1
1 2
−1
2
−2
4
−3
8
6. C R E E M O S E N L A E X I G E N C I A
C U R S O D E Á L G E B R A
En general: Sea 𝑓𝑥 = 𝑏𝑥
; b≠ 1 ∧ 𝑏 > 0
b > 1
𝑦
𝑥
𝑏𝑥
0 < 𝑏 < 1
𝑦
𝑥
1 1
𝑏𝑥
Ambas funciones son inyectivas
𝑏𝑥
= 𝑏𝑦
↔ 𝑥 = 𝑦
Función creciente
𝑏𝑥
< 𝑏𝑦
↔ 𝑥 < 𝑦
Función decreciente
𝑏𝑥
< 𝑏𝑦
↔ 𝑥 > 𝑦
No cambia el sentido
de la desigualdad
Si cambia el sentido
de la desigualdad
Ejemplos:
• 5𝑥
= 54
• 72𝑥−1
= 79 ↔ 𝑥 = 5
• 2𝑥
< 25 ↔ 𝑥 < 5
• 𝑥 ≥ 11↔ 4𝑥
≥ 411
•
1
5
𝑥
<
1
5
3
↔ 𝑥 > 3
•
1
4
𝑥
≤
1
4
8
↔ 𝑥 ≥ 8
↔ 𝑥 = 4
↔ 2𝑥 − 1 = 9
Observación
𝑏𝑥
> 0 ; ∀𝑥 ∈ ℝ
Ejemplo:
2𝑥
> 0 ; ∀𝑥 ∈ ℝ
7. C R E E M O S E N L A E X I G E N C I A
C U R S O D E Á L G E B R A
Ejercicio 1:
Calcule el dominio de la función 𝑓, si: 𝑓𝑥 = 5 𝑥−2
Resolución
De 𝑓 ∶ 𝑥 − 2 ≥ 0 ⟶ 𝑥 ≥ 2
∴ Dom𝑓 = ሾ2; ۧ
+∞
Ejercicio 2:
Resolución
De 𝑔 ∶ ∀𝑥 ∈ ℝ: −1 ≤ sen𝑥 ≤ 1
⟶ −2 ≤ 2sen𝑥 ≤ 2 ⟶ −3 ≤ 2sen𝑥 − 1 ≤ 1
⟶ 𝟐−3
≤ 𝟐2sen𝑥−1
≤ 𝟐1
∴ Ran𝑓 = 2−3
; 21
Si b > 1
𝑦
𝑥
𝑦 = 𝑏𝑥
1
𝑦 = 𝑥
1
𝑦 = log𝑏 𝑥
Si 0 < b < 1
𝑦
𝑥
1
𝑦 = 𝑏𝑥
𝑦 = 𝑥
1
𝑦 = log𝑏 𝑥
Observación
El logaritmo es la función inversa de la función
exponencial.
Calcule el rango de la función 𝑓, si:
𝑓𝑥 = 22sen𝑥−1
; ∀𝑥 ∈ ℝ
8. C R E E M O S E N L A E X I G E N C I A
C U R S O D E Á L G E B R A
Ecuación exponencial
Son las ecuaciones donde la variable se encuentra en el
exponente
Ejemplos:
• 72𝑥+1
= 7 𝑥 −1 • 32𝑥
+ 3𝑥
= 12
• 5−𝑥
− 2 = 25−𝑥
Ejercicio 1:
Resuelva la ecuación siguiente
Resolución :
positivo
32𝑥
− 3 ∙ 3𝑥
−54 = 0
3𝑥
3𝑥
−9
6
3𝑥
− 9 = 0 ∨ 3𝑥
+ 6 = 0
3𝑥
= 9 positivo
→ 𝑥 = 2
∴ CS= 2
32𝑥
+ 2 = 3. 3𝑥
+ 56
3𝑥
− 9 3𝑥
+ 6 = 0
32𝑥
+ 2 = 3𝑥+1
+ 56
Efectuamos :
Ejercicio 2: Resuelva la ecuación siguiente
2𝑥
− 16 2𝑥
− 1 2𝑥
− 3 2𝑥
+ 5 = 0
Resolución :
2𝑥
− 16 = 0 ∨ 2𝑥
−1 = 0 ∨ 2𝑥
−3 = 0 ∨ 2𝑥
+5 = 0
→ 𝑥 = 4 ∨ 𝑥 = 0 ∨ 𝑥 = log23
∴ CS= 4 ; 0 , log23
2𝑥
= 16 ∨ 2𝑥
= 1 ∨ 2𝑥
= 3
9. C R E E M O S E N L A E X I G E N C I A
Inecuación exponencial
C U R S O D E Á L G E B R A
Son las inecuaciones donde la variable se encuentra en el
exponente
Ejemplos:
• 3𝑥+2
< 3𝑥−3
• 4𝑥
+ 2𝑥
≥ 6
• 7−𝑥
+ 2 ≤ 49−𝑥
Ejercicio 1:
Resuelva la inecuación siguiente
5 𝑥 +8
> 125 𝑥
Resolución :
5 𝑥 +8
> 5 3 𝑥
Como la base es 5, mayor a 1, entonces la
desigualdad no cambia su sentido
8 > 2 𝑥 ↔ 𝑥 < 4
∴ CS= −4; 4
↔ −4 < 𝑥 < 4
Ejercicio 2:
Resuelva la inecuación siguiente
log2𝑥 − 5 5𝑥
+ 1 > 0
𝑥 + 8 > 3 𝑥
Resolución :
• log2𝑥 existe en los ℝ ↔ 𝑥 > 0
• Resolvemos la inecuación:
log2𝑥 − 5 5𝑥
+ 1 > 0
positivo
⟶ log2 x − 5 > 0
⟶ log2 x > ⟶ 𝑥 > 32
∩
∴ CS= 32 ; +∞
log232
10. C R E E M O S E N L A E X I G E N C I A
Ejercicio 3:
Halle la inversa de la función 𝑓 𝑥 = 2𝑥
− 3 ; 𝑥 ≥ 2
Resolución :
Graficando la función, tenemos:
𝑦
𝑥
𝑦 = 2𝑥
𝑦 = 2𝑥
− 3
1
𝑦
𝑥
𝑦
𝑥
Por su gráfica, es una
función inyectiva
→ Ran 𝑓 = ሾ1 , ۧ
+∞
3) Cálculo del 𝑦 = 𝑓∗
(𝑥)
• Se despeja 𝑥: 𝑓 𝑥 = 2𝑥
− 3
𝑦 =
→ 𝑦 = 2𝑥
− 3
→ 2𝑥
= 𝑦 + 3
Por definición de logaritmo::
x = log2 𝒚 + 3
• Se intercambia 𝑥 con 𝑦: 𝐲 = log2 𝒙 + 3
𝑓∗
(𝑥) = log2 𝑥 + 3
∴
−2
−3
𝑓𝑥 = 2𝑥 − 3 ; 𝑥 ≥ 2
2
1)
2) Tenemos:
𝑓 2 = (2)2
−3 = 1
1
; 𝑥 ∈ ሾ1 , ۧ
+∞
C U R S O D E Á L G E B R A
11. C R E E M O S E N L A E X I G E N C I A
C U R S O D E Á L G E B R A
Observación
La ecuación 𝑓(𝑥) = 𝑔(𝑥) gráficamente tiene 𝑛
soluciones reales si la gráfica de 𝑓𝑥 corta a la
gráfica de 𝑔 𝑥 en 𝑛 puntos.
Ejercicio 4:
Determine el número de soluciones reales de la ecuación:
𝑥2
− 𝑥 = 2 + log2𝑥
Resolución :
𝑥2 − 𝑥 = 2 + log2𝑥
De la ecuación:
𝑥2
− 𝑥 − 2 = log2𝑥
→
→ 𝑥 − 2 𝑥 + 1 = log2𝑥
𝒇 𝒙 𝒈 𝒙 ; 𝒙 > 𝟎
𝑦
𝑥
Graficamos las funciones
Por lo tanto, tiene 2 soluciones.
2
−1 1
12. w w w . a c a d e m i a c e s a r v a l l e j o . e d u . p e