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Question

The distance between the origin and the tangent to the curve y=e2x+x2 drawn at the point x=0 is

A
15
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B
25
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C
15
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D
23
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Solution

The correct option is A 15
y=e2x+x2
At x=0y=1
dydx=2e2x+2x
Slope of tangent at (0,1) =2
Equation of tangent through (0,1) is
y1=2(x0)
y2x1=0
Distance of tangent from origin =|11+4|=15

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