(x的n次方)的m-1次方/(x的n-1次方)的m+2次方
=(x的n(m-1)次方)/(x的(n-1)(m+2)次方)
=x的n(m-1)-(n-1)(m+2)次方
=x的(nm-n-nm-2n+m+2)次方
=x的m-3n+2次方
解:
原式
=x^[n(m-1)] /x^[(n-1)(m+2)]
=x^(mn-n) /x^(mn-m+2n-2)
=x^(mn-n-mn+m-2n+2)
=x^(m-3n+2)
即x的m-3n+2次方
原式=x的n(m-1)次方/x的(n-1)(m+2)次方
=x的[n(m-1)-(n-1)(m+2)]次方
=x的(mn-m-mn-2n+m+2)次方
=x的(-2n+2)次方