Posted by **jane** on Tuesday, November 25, 2008 at 5:21pm.

Let f(x) = 2/3-x

a) find the slope of the tangent to the graph of f at a general point x0 using the definition of the dervative.

b) use the result in part a to find the slope of the tangent at x0=1.

I am very confused.

My answer for (a) 1/ 6-6x-x^2

(b) -1

I compared them to a classmate - answers didn't agree.

I am lost.

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