Respuesta :

It was found that

[tex]f^{\prime}(x)=4xcos(x)-4xsin(x)+4sin(x)+4cos(x)[/tex]

Then, evaluating at x=4,

[tex]f^{\prime}(4)=4*4cos(4)-4*4sin(4)+4sin(4)+4cos(4)=20cos(4)-12sin(4)[/tex]

Therefore, the exact answer is 20cos(4)-12sin(4)

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