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An integrating factor of the differentia...

An integrating factor of the differential equation
`ylogy(dx)/(dy)+x-logy=0`, is

A

`log(logy)`

B

`logy`

C

`(1)/(logy)`

D

`(1)/(log(logy))`

Text Solution

Verified by Experts

The correct Answer is:
B
We have, `(dx)/(dy)+(1)/(y log y)x=(1)/(y)`
`"I.F."=e^(int(1)/(y log y))dy=e^(log(logy))=logy`
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OBJECTIVE RD SHARMA-DIFFERENTIAL EQUATIONS-Chapter Test
  1. An integrating factor of the differential equation ylogy(dx)/(dy)+x-...

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  2. If (x^2+y^2)dy=xydx and y(1)=1 and y(xo)=e, then xo=

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  3. The differential equation of the family of curves y^(2)=4xa(x+1), is

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  4. y=ae^(mx)+be^(-mx) satisfies which of the following differential equat...

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  5. The solution of the differential equation (dy)/(dx)=e^(y+x)+e^(y-x), i...

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  6. The differential equation of the family of curves y=e^(2x)(a cos x+b s...

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  7. The differential equation obtained by eliminating A and B from y = A c...

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  8. The solution of (dy)/(dx)=((y)/(x))^(1//3), is

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  9. The slope of the tangent at (x , y) to a curve passing through a po...

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  10. The solution of the differential equaton y-x(dy)/(dx)=a(y^(2)+(dy)/(...

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  11. The solution of the differential equation (x+2y^(2))(dy)/(dx)=y, is

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  12. The general solution of the differential equation (dy)/(dx)+sin(x+y)/2...

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  13. The solution of (dy)/(dx)-y=1, y(0)=1 is given by y(x)=

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  14. The number of solution of y'=(x+1)/(x-1),y(1)=2, is

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  15. What is the solution of y'=1+x+y^(2)+xy^(2),y(0)=0?

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  16. solution of the differential equation xdy-ydx=sqrt(x^2+y^2 )dx is

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  17. Integral curve satisfying y'=(x^2+y^2)/(x^2-y^2), has the slope at th...

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  18. The differential equation which represents the family of plane curves ...

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  19. A continuously differentiable function phi(x)in (0,pi//2) satisfying y...

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  20. The solution of the differential equation (d^(2)y)/(dx^(2))=e^(-2x), i...

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  21. The order and degree of the differential equation (d^(2)y)/(dx^(2))=sq...

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