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`int_(1)^(2)log_(e)xdx` किसके बराबर है ?A. `log_(e)4`B. `log_(e)2`C. `log_(e)((4)/(e))`D. `log_(e)((e)/(4))` |
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Answer» Correct Answer - C माना `I=int_(1)^(2)logxdx=int_(1)^(2)underset(I)(logx)*underset(II)(1dx)` `=[logx*x-int(1)/(x)*xdx]_(1)^(2)` `=[xlogx-x]_(1)^(2)` `=2log2-2-1*log1+1` `=2log2-1-0=2log2-1` `=log_(e)4-log_(e)e=log_(e)((4)/(e))` |
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