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If P(x) is a polynomial of degree 3 sati...

If `P(x)` is a polynomial of degree 3 satisfying `p(-1)=10 ,p(1)=-6a n dp(x)` has maxima at `x=-1a n dp^(prime)(x)` has minima at `x=1,` find the distance between the local maxima and local minima of the curve.

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