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Questions › IIT JAM › IIT JAM 2023 › Q16
2 marks, −0.667Mathematics › Difference and differential equations › First-order differential equationsHardabout 3 min

IIT JAM 2023 Question 16: Difference and differential equations

Let y=y(x)y=y(x)y=y(x) solve xdydx=yln⁡ ⁣(yx)x\dfrac{dy}{dx}=y\ln\!\left(\dfrac{y}{x}\right)xdxdy​=yln(xy​), y>x>0y>x>0y>x>0. If y(1)=e2y(1)=e^2y(1)=e2 and y(2)=αy(2)=\alphay(2)=α, then dydx\dfrac{dy}{dx}dxdy​ at (2,α)(2,\alpha)(2,α) equals

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Let y=y(x) solve xdy/dx=yln (y/x), y>x>0. If y(1)=e² and y(2)=α, then dy/dx at (2,α) equals (A) α (B) α/2 (C) 2α (D) 3α/2

Also written as: Let y=y(x) solve xdy/dx=yln (y/x), y>x>0. If y(1)=e^2 and y(2)=alpha, then dy/dx at (2,alpha) equals

Difference and differential equations has come up 20 times in 5 exams since 2014.

What this question tests

This question is on First-order differential equations, part of Difference and differential equations in Mathematics.

Solving equations in a function and its first derivative.

TestStop has 7 past-paper questions on this subtopic; the nearest in year are below.

  • IIT JAM 2021 · Q8The differential equation (3x² y + y³) dx + (x³ + 3xy²) dy = 0 is
  • IIT JAM 2021 · Q54Let y(x) > 0 solve dy/dx + y = y². If y(ln 2) = 1/3, then y(ln 3) equals _ (round off to 2 decimal places).
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