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Questions  

 The equations of the tangents at the origin to the curve y2=x21+x+x2 is 

a
x=±y
b
2x=±y
c
3x=±y
d
2y=±x

detailed solution

Correct option is A

Given curve is y2=x21+x+x2                          ⇒y=±x2+x3+x4  ⇒dydx=±2x+3x2+4x32x2+x3+x4=±2+3x+4x221+x+x2       at 0,0 ,m=±1       equation of tangent at  0,0 is y=±x

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