I have a small question. I have to take the derivative of

y=(ln(x)+c)/x

i know i have to use the quotient rule but i dont know what to do with the derivative of c. Do i turn it into a one or drop ot all together. I am doing a diffyQ problem and that equation has to be a solution of

(x^2)y'+xy=1

i keep getting 1+x=1 so i think the "c" is messing me up.

Thanks for any help that anyone can provide