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A tangent at (x1,y1) to the curve y=x3+2x2+4 and passes through origin, then (x1,y1) is

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A tangent at (x1,y1) to the curve y=x3+2x2+4 and passes through origin, then (x1,y1) is: 

Options: (a) (0, 4) (b) (−1,5) (c) (1,7) (d) (2, 20) 

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Answer is C (1,7)


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