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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- Feb 28th 2008, 07:51 PMArmiAldihorizontal tangent
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) - Feb 28th 2008, 10:57 PMearboth
- Feb 28th 2008, 11:30 PMmr fantasticQuote:

Originally Posted by**earboth;111724[snip**

.

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.