a 72 dy dx + xy +1=0 b ) dx dy _ 2y te2x = 0, y(0) = 2 c) (2xy + y? ) dx + (x2 + 2xy)dy = 0 e dy dx = xy2 - xy, y(0) = -1 e) day dx4 Ex- 1, y(0) = y'(0) = 1, y"(1) = y""(1) = 0