Question 1048701
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Use the chain rule. *[tex \Large \frac{dy}{dx}\ =\ \frac{dy}{du}\,\cdot\,\frac{du}{dx}].


For *[tex \Large f(x)\ =\ (7x\ -\ 9)^8], let *[tex \Large u\ =\ 7x\ -\ 9]


Then *[tex \Large \frac{df}{du}\ =\ 8u^7] and *[tex \Large \frac{du}{dx}\ =\ 7], so *[tex \Large\ \ \frac{df}{dx}\ =\ 7\,\cdot\,8u^7\ =\ 56(7x\ -\ 9)^7]


John
*[tex \LARGE e^{i\pi}\ +\ 1\ =\ 0]
My calculator said it, I believe it, that settles it
<img src="http://c0rk.blogs.com/gr0undzer0/darwin-fish.jpg">
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