1.(_a^2m-1_)÷a^m=a^m-1
2.a^2m÷(_a^m+1_)=a^m-1
3.应该是当x≠__1/2_时,(2x-1)^0=1
4.[(-1/2)^1]-2+(派-3014)^0-(-2)^-3
=(-1/2)-2+1-1/(-2)^3
=-1/2-2+1+1/8
=-11/8
1.(_a^2m-1_)÷a^m=a^m-1
2.a^2m÷(_a^m+1_)=a^m-1
3.应该是当x≠__1/2_时,(2x-1)^0=1
4.[(-1/2)^1]-2+(派-3014)^0-(-2)^-3
=(-1/2)-2+1-1/(-2)^3
=-1/2-2+1+1/8
=-11/8