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Question

Find the slope of the tangent to curve y=x3x+1 at the point whose x-coordinate is 2.

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Solution

The given curve is y=x3x+1

dydx=3x21

The slope of the tangent to the curve at x=2 is given by,

(dydx)x=2=(3x21)x=2=3(2)21=11

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