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Question: Answered & Verified by Expert

Let y=y1x and y=y2x be the solution curves the differential equation dydx=y+7 with initial conditions y10=0 and y20=1 respectively. Then the curves y=y1x and y = y2x intersect at

MathematicsDifferential EquationsJEE MainJEE Main 2023 (13 Apr Shift 1)
Options:
  • A no point
  • B two points
  • C one point
  • D infinite number of points
Solution:
2183 Upvotes Verified Answer
The correct answer is: no point

We have been given thatdydx=y+7dyy+7=dx

ln|y+7|=x+c

|y+7|=k.ex

y=k·ex-7

y10=0k=7y1x=7ex-1

y20=11=k-78=k

y2x=8ex-7

y1x=y2x8ex-7=7ex-7

Hence, No point of intersection.

This is the required option.

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