Tangent to Cubic

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A cubic function f ( x ) f(x) has a maximum value of 5 5 at x = − 2 x = -2 . The equation of the line tangent to the curve y = f ( x ) y = f(x) at point ( 0 , 1 ) (0, 1) is y = 8 x + 1 y = 8 x + 1 . What is the sum of all the coefficients of the function f ( x ) f(x) ?

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Ajay Dutta by Ajay Dutta , 24, India

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