下列运算正确的是 ( )
A.x10÷(x4÷x2)=x8 | B.(xy) 6÷(xy) 2=(xy) 3=x3y3 |
C.xn+2÷xn+1=x-n | D.x4n÷x2n x3n=x-n |
A.x10÷(x4÷x2)=x8 | B.(xy) 6÷(xy) 2=(xy) 3=x3y3 |
C.xn+2÷xn+1=x-n | D.x4n÷x2n x3n=x-n |