求x (8-0.1x)的立方+0.027=0
问题描述:
求x (8-0.1x)的立方+0.027=0
答
(8-0.1x)的立方+0.027=0
(8-0.1x)^3=-0.027
8-0.1x=-0.3
0.1x=8+0.3
0.1x=8.3
x=83