ation by sin(xy) +5 +mx] dx + [4 sin(ax) + 12 e³ ³ ln(xy) + c · sin(xy) ] dy = 0 x x У ☐ is exact for a = 2, b = −4, c = 5, m any real ☐ is exact for a = 2, b = −4, c = 5, m = 0 only ☐ is exact for a = 5, b = −4, c = 2, m any real is never exact is exact for b = -4, c = 5 and any reals a, m The differential equation еву 8 y cos(ax) — 3 - X +5 sin(xy) +mx] dx + [4 sin(ax) + 12 e¹³ ln(x y) + · x ☐ is exact for a = 2, b = −4, c = 5, m any real ☐ is exact for a = 2, b = −4, c = 5, m = 0 only ☐ is exact for a = 5, b is never exact is exact for b = = -4, c = 2, m any real -4, c = 5 and any reals a, m