Posted by **olek** on Thursday, May 12, 2011 at 7:31pm.

The function f is given by

ln(e^x − e ^−x) (x > 0).

By applying in turn the Composite and Quotient Rules, calculate

that gives an expression for each of the following.

1. f!(x)

2. f!!(x)

- maths -
**Mgraph**, Thursday, May 12, 2011 at 8:50pm
f!(x)-? maybe f'(x)

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