Question

若（a的m+1次方乘以b的n+2次方）乘以（a的2n次方减去1b的2m次方）=a的3次方b的5次方,则m+n的值为——

Answer 1

m+1+2n-1=3 (1)

n+2+2m=5 (2)

∴(1)+(2)得3m+3n+2=8

3m+3n=6

m+n=2