If general solution of the differential equation ay+ by +cy +dy=0 is linearly spanned by e", Sin x and cos X, then which one of the following holds? (a) atb-c- d= 0 (6) a +b+c+d=0 (c) a - b +c-d=0 (d) a-b-c- d= 0 34.

in this question solutions is the linear span by e^x,sinx and cosx. and diff. eq. is homogeneous so they satisfied the eq., when we put e^x in the equation we get options b, but wh...