Unformatted text preview: 9. Let f (x) = 2x2 + x + 3.
(a) Calculate f 0 (a) using the deﬁnition of the derivative. Be sure to keep your limit
sign around until the end of your calculation! (10 points) (b) Find the equation of the tangent line to the curve y = f (x) at the point ( 2, 9).
(5 points) (c) Find value(s) of x on the curve y = f (x) where the tangent line has slope equal
to 13 at (x, f (x)). (5 points) 7 ...
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