lesson 3 nov 16 09

10
Differentiate exponential Functions

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Page 1: Lesson 3 Nov 16 09

Differentiate exponentialFunctions

Page 2: Lesson 3 Nov 16 09

f(x) = 2x

slope ­ always positive­ increasing

f ' is positiveincreasing

Page 3: Lesson 3 Nov 16 09

Calculate the derivative of f(x) = bx

limh      0

f(x + h) ­ f(x)h

f '(x) = 

= limh      0

bx + h ­ bx

h

Page 4: Lesson 3 Nov 16 09

= limh      0

­ bxbx  bh.h

= limh      0 b

x   h­ 1bh

= bx  limh      0 h­ 1bh

Page 5: Lesson 3 Nov 16 09

limh      0 h

­ 1bh

Page 6: Lesson 3 Nov 16 09

f(x) = 2x

f '(x) = ln2 (2x)

Page 7: Lesson 3 Nov 16 09

f(x) = 3x

f '(x) = ln3 (3x)

Page 8: Lesson 3 Nov 16 09

Find the derivative of  f(x) = ex

= exdxd (ex) = ln e (ex)

f '(x) = ex

Page 9: Lesson 3 Nov 16 09

Given   f(x) = 3  4x + 7ex.

find dxd (f(x))

Page 10: Lesson 3 Nov 16 09

Exercise 4.2

odd questions 

1 ­ 21