Skip to main contentSkip to solution

The area bounded by the curve y=logx,y=0y = \log x, y = 0 and x=ex = e, is

Solution

Correct Option: 3

The area bounded by the curve y=logxy = \log x, y=0y = 0, and x=ex = e needs to be found.

The curve y=logxy = \log x crosses the x-axis when logx=0\log x = 0, which occurs at x=1x = 1 since log1=0\log 1 = 0.

The region extends from x=1x = 1 to x=ex = e.


The area is given by:

Area =1elogxdx= \int_{1}^{e} \log x \, dx


Using the standard integration formula:

logxdx=xlogxx+C\int \log x \, dx = x \log x - x + C


Applying the limits:

Area =[xlogxx]1e= [x \log x - x]_{1}^{e}

At x=ex = e:

elogeee \cdot \log e - e

=e1e= e \cdot 1 - e

=0= 0

At x=1x = 1:

1log111 \cdot \log 1 - 1

=101= 1 \cdot 0 - 1

=1= -1


Area =0(1)= 0 - (-1)

=1= 1

Therefore, the area bounded by the curve is 11 square unit.

Keyboard Shortcuts

  • Left arrow: Previous question
  • Right arrow: Next question
  • S key: Jump to solution
  • Q key: Jump to question