Q35 / 90 · JEE Main 2023 (06 Apr Shift 2) · Mathematics

If the solution curve f(x, y)=0 of the differential equation 1+logexdxdy-xlogex=ey, x>0, passes through the points (1, 0) and (a, 2), then aa is equal to

  • Correct answer
    A
    e2e2
  • B
    ee2
  • C
    e2e2
  • D
    e2e2

Solution

The given differential equation is

1+lnxdxdy-xlnx=ey

Put xlnx=t

⇒1+lnxdx=dt

⇒dtdy-t=ey which is a linear differential equation.

I.F=e-∫dy

=e-y

The solution of the differential equation is

⇒t×e-y=∫ey×e-ydy+c

⇒t×e-y=y+c

⇒xlnx=y ey+c ey

Put x=1, y=0

⇒ c=0

Put x=a, y=2

alna=2e2

∴ aa=e2e2

Hence this is the correct option.

Hence, the correct answer is option: 'A'.

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