The three functions ,

MATHEMATICS · Subjective · A Level · Mathematics · Differentiation · Differentiation

Problem

The three functions u(x)=sin⁡x+xu(x)=\sin x + x, v(x)=cos⁡x+1v(x)=\cos x + 1, and w(x)=−sin⁡xw(x)=-\sin x are graphed without labels. Exactly one of these functions is the second derivative of another of the three. Identify the function that must be a second derivative.

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