7. Find all values of x for the given function where the tangent line is horizontal. f(x) = root( x^2 + 18x + 86) 9. Find derivative y = ( 6e^x) / ( 2e^x + 1)
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Originally Posted by ArmiAldi 7. Find all values of x for the given function where the tangent line is horizontal. f(x) = root( x^2 + 18x + 86) 9. Find derivative y = ( 6e^x) / ( 2e^x + 1) . Now calculate the first derivative: f'(x) = 0 if the numerator equals zero and the denominator is not zero: . Use quotient rule:
Originally Posted by earboth;111724[snip . Use quotient rule: Alternatively, note that . The derivative of the first term is obviously zero. To get the derivative of the second term, you can use either the chain or quotient rule.
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