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Q.

The point of the parabola  y=x2+7x+2 which is closest to the line y=3x3  is

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a

(2,8)

b

(2,8)

c

(2,8)

d

(2,8)

answer is D.

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Detailed Solution

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Differentiating the given curve w.r.t to x
2x+7=3=slope of the tangent, here x=2 put in the given curve, we get  y=8
the point is  (2,8)
 

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