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If f'(x)=(1)/(1+x^(2)) for all x and f(0...

If `f'(x)=(1)/(1+x^(2))` for all x and `f(0)=0`, show that `0.4 lt f (2) lt2`

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The correct Answer is:
From (3), (4) and (5) it follows that `0.4 lt f (2) lt 2`.
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