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Section 2.3

Section 2.3. Differentiation Formulas. DIFFERENTIATION FORMULAS FOR BASIC FUNCTIONS. 1. The derivative of a constant function, f ( x ) = c. 2. The derivative of the identity function, f ( x ) = x. THE POWER RULE.

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Section 2.3

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  1. Section 2.3 Differentiation Formulas

  2. DIFFERENTIATION FORMULAS FOR BASIC FUNCTIONS 1. The derivative of a constant function, f (x) = c 2. The derivative of the identity function, f (x) = x

  3. THE POWER RULE Let n be any integer other than zero. Then the derivative of the function f (x) = xn is

  4. THE CONSTANT MULTIPLE RULE If c is a constant and f is a differentiable function, then

  5. THE ADDITION AND SUBTRACTION RULES If f and g are both differentiable functions, then

  6. THE MULTIPLICATION RULE If f and g are both differentiable functions, then Another way to write this is

  7. THE QUOTIENT RULE If f and g are differentiable, then Another way to write this is

  8. A MNEMONIC DEVICE FOR THE QUOTIENT RULE If the function in the numerator is called “hi” and the function in the denominator is called “ho,” the quotient rule can be remembered with the following mnemonic phrase. ho D hi minus hi D ho over ho ho In mathematical notation, this would be ho D hi − hi D ho ho ho Recall that “D” means “derivative of.”

  9. All the derivative rules are summarized in the box on page 154 of the text.

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