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Evaluate : int4^9 1/(sqrt(x))dx...

Evaluate : `int_4^9 1/(sqrt(x))dx`

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`int_4^9 1/(sqrt(x))dx`
=`int_4^9((x)^(-1/2))dx`
`=[x^(-1/2+1)/(-1/2+1)]_4^9`
`=[2sqrt(x)]_4^9`
`=2[3−2]=2`
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