Question 13 Let f(x) =x.cos(x2). What is the correct result of the derivative of f with respect to x? =X•COS A(x)=cos(x²) – 2r-sin(x²) COS f(x)=2r2sin(x?) + cos (x²) (2*)so3 O(x)=cos(x?) - xsin(x²) =COS Df(x)=-2r2sin(x²) Ouertian 14

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