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Question

The solution of dydx=x+y+12x+2y+3 is.

A
23(x+y)+19log(2x+2y+4|=x+c
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B
23(x+y)+19log(3x+3y+4|=x+c
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C
23(x+y)+19log(3x+3y|=x+c
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D
19log(3x+3y+4|=x+c
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Solution

The correct option is B 23(x+y)+19log(3x+3y+4|=x+c
Here a1a2=b1b2Let x+y=v1+dydx=dvdxdydx=dvdx1dvdx1=v+12v+3dvdx=3v+42v+32v+33v+4dv=dx +c23dv + 1313v+4dv =x+c23v +19log(3v+4|=x+c23(x+y)+19log(3x+3y+4|=x+c

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