Posted by Jane on Sunday, December 11, 2011 at 7:59pm.
Let f be the function given by f(x)= x^2+4x8. The tangent line to the graph at x=2 is used to approximate values of f. For what value(s) of x is the tangent line approximation twice that of f?

calculus  Anonymous, Thursday, December 15, 2011 at 9:10am
2X+4
2(2)+4
4+4
F(2)=8
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