we have y'=f(x)y+g(x) when f and g are continues on (a,b).

and there is a point x_0 for which g(x_0) differs zero.suppose that u_1 and u_2 are

solution to the equation on (a,b) .and if for some c,d d*u_1+c*u_2 is also a solution

thn we cn conclude that : (we need to choose one of the options)

A. c or d is zero

B. c=1-d

C. c^2+d^2=1

D.if u_1 and u_2 are

solution to the equation then d*u_1+c*u_2 is also a solution

i only know that on (a,b) there could be a single solution for the initial condition.

thats my theoretical knowledge on the subject