Answer Happy

Question 7 Answer saved Marked out of 5.00 Flag question Question [5 points]: The DE: (15x³3 is an exact differential equation if N(x, y) is equal to Select one: ○ N(x, y) = 3y² + ○ N(x, y) = 3x² + None of these. ○ N(x, y) = y² = ○ N(x, y) = 6y + sin xy sin cos xy cos xy 8 + -sin xy) dx ixy) X = -N(x, y)dy