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April 18, 2015

April 18, 2015

Posted by **albert** on Tuesday, May 17, 2011 at 2:25pm.

By applying in turn the Composite and Quotient Rules, find derivative and second derivative.

Thanks.

- maths -
**Reiny**, Tuesday, May 17, 2011 at 5:10pmf '(x) = (e^x + e^-x)/(e^x - e^-x)

= e^-x(e^(2x) + 1)/(e^-x(e^(2x) - 1)

= (e^(2x) + 1)/(e^(2x) -1)

now use the quotient rule to get the second derivative,

let me know what you got.

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