Question: The point ( 1 , - 1 5 ) lies o n a differentiable function f ( x ) . The tangent line t o

The point (1,-15) lies on a differentiable function f(x). The tangent line tof(x)atx=1 also goes
through the point (11,55). What isf'(1)?
f'(1)=
The point ( 1 , - 1 5 ) lies o n a differentiable

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