複選題5. (5%) Which are the possible solutions of the differential equation ? (A) y+Inly-1l=x (B) 2y+In|y-1|=4x (C) 2y+1n|2y-1|=4x+4 (D)y2 =2x (E) y2=-2x+1

4. (5%) Consider the equationwiththe boundary conditions y(0)=0.y(π)=π.Which statements are correct? (A) The particular solution is yP =-x. (B) The general solution is y=ex sinx+x. (C) There is a unique solution to this boundary-value problem. (D) This differential equation is homogencous. (E) None of the above.