问题
解答题
xm=2,xn=3;
求:(1)xm+n的值;
(2)x2m-n的值.
答案
(1)∵xm=2,xn=3,
∴xm+n=xm•xn=6;
(2)∵xm=2,xn=3,
∴x2m-n=(xm)2÷xn=4÷3=
.4 3
xm=2,xn=3;
求:(1)xm+n的值;
(2)x2m-n的值.
(1)∵xm=2,xn=3,
∴xm+n=xm•xn=6;
(2)∵xm=2,xn=3,
∴x2m-n=(xm)2÷xn=4÷3=
.4 3