0.5aˇn-1×bˇm-2×c×(ˉ0.2aˇ2bˇ3)=?
问题描述：
0.5aˇn-1×bˇm-2×c×(ˉ0.2aˇ2bˇ3)=?
答
0.5aˇn-1×bˇm-2×c×(ˉ0.2aˇ2bˇ3)
=-0.1a^n+1 xb^m+1xc
如追加其它问题,0.1哪来的呀0.2x0.5呀没有化到最简，应该是0.1a^n+b^m+1+c，对吗？0.5aˇn-1×bˇm-2×c×(ˉ0.2aˇ2bˇ3)=-0.1a^（n+1） b^（m+1）c