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Question: Answered & Verified by Expert
If a curve passes through the origin and the slope of the tangent to it at any point x, y is x2-4x+y+8x-2, then this curve also passes through the point:
MathematicsDifferential EquationsJEE MainJEE Main 2021 (25 Feb Shift 1)
Options:
  • A 5,4
  • B 4,4
  • C 4,5
  • D 5,5
Solution:
2112 Upvotes Verified Answer
The correct answer is: 5,5
Given

y0=0

and dydx=x-22+y+4x-2

dydx-yx-2=x-2+4x-2

 I.F.=e-1x-2dx=1x-2

Solution of L.D.E.

 y1x-2=1x-2x-2+4x-2·dx

yx-2=x-4x-2+C

Now, at x=0,y=0C=-2

y=xx-2-4-2x-2

y=x2-4x

This curve passes through 5, 5

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