Let f(x)=1x∫0xcos(t2)dtf(x) = \frac{1}{x} \int_0^x \cos(t^2) dtf(x)=x1∫0xcos(t2)dt. Find f′(0)f'(0)f′(0).
000
111
1/21/21/2
−1/2-1/2−1/2