(d) )? which of the following are the integrating factor of the differential (x dy + v d 1 n>1 (b) (x+y) n>1 (a) (xy) 1 1 (d) xy (c)

see this attachment . you will definitely get ur answer

see these attaachments

since they have asked then only go for those options which have the form like (xy)

first of all your differential is exact only. there is no need to find integrating factor for this. bcoz u can write you differential as

option A and D are correct.

options a , d are correct

answer is D