1.

For `y gt 0 and x in R, ydx + y^(2)dy = xdy` where y = f(x). If f(1)=1, then the value of f(-3) isA. 1B. 2C. 3D. 4

Answer» Correct Answer - C
`(x dy-y dx)/(y^(2))=dy`
`rArr" "-int d((x)/(y))=int dy`
`rArr" "-(x)/(y)=y+c`
At `x = 1, y = 1" "therefore" "c = -2`
At `x = -3, (3)/(y)=y-2`
`rArr" "y^(2)-2y - 3 = 0`
`rArr" "y = 3`


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