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Consider the functions `f (x) and g (x)`, both defined from `R-> R` and are defined as `f(x)=2x-x^2 and g (x)=x^n` wherc `n in N`. Ifthe area between `f(x) and g (x)` in first quadrant is `1/2` then n is a divisor of (A)12 (B) 15 (C) 20 (D)30

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