Posted by **Allison** on Thursday, September 29, 2011 at 1:07pm.

If f(x)=(3x)/(1+x^2)

find f′(4).

Use this to find the equation of the tangent line to the curve y=3x1+x2 at the point (4,0.70588). The equation of this tangent line can be written in the form y=mx+b where m is:

and where b is:

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