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Questions  

 Solution of xy4+ydxxdy=0 is 

a
x44+xy3=c
b
x44+13xy3=c
c
x44+3xy2=c
d
x44−13xy3=c

detailed solution

Correct option is B

xy4+ydx=xdy dydx=xy4+yxdydx=yx=y41y4dydx−1y31x=1 substitute 1y3=v-1y3=v⇒3y4dydx=dvdxdvdx+3xv=3 IF=e∫3xdx=x3GS. is v IF =∫Q IFdx-x3y3=3∫x3dx⇒-xy3+c=34x4

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