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Let f(x)=int(1)^(x) sqrt(2-t^(2)) dt, th...

Let `f(x)=int_(1)^(x) sqrt(2-t^(2)) dt`, then the real roots of the equation `x^(2) -f'(x) =0` are

A

`pm 1`

B

`pm (1)/(sqrt(2))`

C

`pm(1)/(2)`

D

0 and 1

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A
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