Question

已知m+3的绝对值与m+n-1的绝对值互为相反数,则m的n次方等于几

Answer 1

(m+3)的绝对值>=0,(m+n-1)的绝对值>=0,
互为相反数,
m+3=0,m=-3;
m+n-1=0,-3+n-1=0,n=4
m^n=(-3)^4=3^4=81