1.

Thesolution of the differential equation `(dy)/(dx)=(x+y)/x`satisfying the condition `y""(1)""=""1`is(1) `y""="ln"x""+""x`(2) `y""=""x"ln"x""+""x^2`(3) `y""=""x e(x-1)`(4) `y""=""x"ln"x""+""x`

Answer» `y = vx`
`dy/dx = (x + vx)/x`
`= 1+v`
diff wrt x
`dy/dx = v + x(dv)/dx= 1+ v`
`x (dv)/(dx) = 1`
`int dv = int dx/x`
`v/x = ln x + c`
`y = x ln x + cx`
`1= c*1 = 1`
`c=1`
so,`y= x ln x + x`
option 4 is correct


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