Question

x加2的绝对值与y-3的绝对值互为相反数,则x+y=++x的y次幂是多少

Answer 1

|x+2|>=0,|y-3|>=0,而两者互为相反数,说明|x+2|和|y-3|均为0故x=-2,y=3x+y=-2+3=1x^y=(-2)^3=-8