If the area of the bounded region R = x , y : max 0 , log e x ≤ y ≤ 2 x , 1 2 ≤ x ≤…

If the area of the bounded region R=x,y:max0,logexy2x,12x2 is, αloge2-1+βloge2+γ then the value of α+β-2γ2 is equal to:
  1. 8
  2. 2
  3. 4
  4. 1

Solution

R=x,y:max0,logexy2x,12x2

So, the area of the region is

1222xdx-12nxdx

=2xln21/22-xlnx-x12

=22-21/2loge2-2ln2-1

=22-2loge2-2ln2+1

 α=22-2,β=-2,γ=1

So, α+β-2γ2

=22-2-2-22

=-22=2

Asked in: JEE Main 2021 (27 Jul Shift 1)

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