Question

需要清晰明了的解题过程!已知x^m+n=3,y^m+n=2,求(-3/1 x^m y^n).(-2/1 x^n y^m)

Answer 1

(-1/3 x^m y^n).(-1/2 x^n y^m)=1/6(x^m+n*y^m+n)=1/6*3*2=1