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प्रश्न
Evaluate the following: `int logx/x.dx`
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उत्तर
Let I = `int logx/x.dx`
Put log x = t
∴ `(1)/x.dx` = dt
∴ I = `int t.dt`
= `t^2/(2) + c`
= `(logx)^2/(2) + c`
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