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The differential equation for the family...

The differential equation for the family of curves `x^(2)-y^(2)-2ay=0`, where a is an arbitrary constant, is

A

`(x^(2)-y^(2)) (dy)/(dx) = 2xy`

B

`2(x^(2) + y^(2)) (dy)/(dx) = xy`

C

`(x^(2) - y^(2))(dy)/(x) = xy`

D

`(x^(2)+y^(2))(dy)/(dx) = 2xy`

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The correct Answer is:
A
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AAKASH INSTITUTE-DIFFERENTIAL EQUATIONS-Assignment (Section - A) Competition Level Questions
  1. The number of solution of dy / dx = (y +1) / (x-1) when y(1) = 2 is

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  2. The differential equation y(dy)/(dx) + x = c represents

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  3. The integrating factor of differential equation dy/dx+y=(1+y)/x is

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  4. The differential equation for the family of curves x^(2)-y^(2)-2ay=0, ...

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  5. The general solution of (dy)/(dx) = 2x e^(x^(2)-y) is

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  6. The curve in which the slope of the tangent at any point equal the rat...

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  7. The solution of the equation (2y-1)dx - (2x + 3)dy = 0 is

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  8. Let f(x) = secx*f'(x), f(0) = 1, then f(pi/6) is equal to (i)1/sqrte ...

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  9. The integrating factor of (1+y^(2)) dx = (tan^(-1)y-x) dy is -

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  10. The order & the degree of the differential equation whose general ...

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  11. The solution of the differential equation dy/dx=cos(x-y) is

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  12. (dy)/(dx) = (xy+y)/(xy+x), then the solution of differential equation ...

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  13. The differential equation ydy+xdx = dx represents

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  14. The integrating factor of cos^(2) x(dy)/(dx) +y = tan x is

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  15. The integrating factor of (dy/dx)+2y = xe^(4x) is

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  16. The integrating solution of differential equation (dy)/(dx) = e^((x^(2...

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  17. Family y = Ax + A^(3) of curves will correspond to a differential equa...

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  18. The solution of differential equation cosx. Sin ydx + sin x. cosydy = ...

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  19. The solution of diferential equation (dy)/(dx) = (1+y^(2))/(1+x^(2)) i...

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  20. The solution of differential equation ydx + (x+xy)dy = 0 is

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