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If f(x)=int0^1(dt)/(1+|x-t|) ,then f^(pr...

If `f(x)=int_0^1(dt)/(1+|x-t|)` ,then `f^(prime)(1/2)` is equal to (a)0 (b) `1/2` (c) 1 (d) none of these

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