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dx is equal to

 
log 2 - 1
-(2 log 2 - 2)
2 log 2 - 1
0

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How

Right ans is 2

We have integral (log x) dx = x(logx-1)
apply the upper limit which is equal to 0 and lower limit value which is our answer -2(log2-1) =-(2log2-2)

How