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CHAPTER 4 DIFFERENTIATION
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INTRODUCTION Differentiation
Process of finding the derivative of a function. Notation
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DERIVATIVE OF A POWER FUNCTION
If n is an integer, then:
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DERIVATIVE OF A CONSTANT
If f is differentiable at function x and c is any real number, then c is differentiable:
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Example 1 Differentiate the following function:
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DERIVATIVE OF SUM AND DIFFERENCE RULES
If f and g are differentiable at function x, then the function f+g and f-g are differentiable:
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Example 2 Differentiate the following function:
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Derivative of Trigonometric Functions
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DERIVATIVE OF EXPONENTIAL & LOGARITHMIC FUNCTIONS
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PRODUCT RULE If u and v are differentiable at function x, then so the product u.v, thus
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Example 3: Differentiate the following function:
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QUOTIENT RULE If u and v are differentiable at function x, then is also differentiable
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Example 4 Differentiate the following function:
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Example 5 Differentiate and SIMPLIFY the following function:
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Example 6 Differentiate the following function:
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COMPOSITE FUNCTION The Chain Rule
If g is differentiable at point x and f is differentiable at the point g(x), then is differentiable at x. Let and , then
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Example 7 Differentiate the following function:
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COMPOSITE FUNCTION “Outside-Inside” Rule
Alternative method for Chain Rule: If ,then
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Example 8 Differentiate the following function:
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IMPLICIT DIFFERENTIATION
These equation define an implicit relation between variables x and y. When we cannot put an equation F(x,y)=0 in the form y = f(x), use implicit differentiation to find
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IMPLICIT DIFFERENTIATION
Differentiate both sides of the equation with respect to x, treating y as a differentiable function of x Collect the terms with on one side of the equation Solve for
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