prove or disprove
来源:
yma16
于
2009-09-19 22:44:53
[
博客
] [
旧帖
] [
给我悄悄话
] 本文已被阅读:次
For z=(-1)^y, y is irrational, z is not a real number.
More generally,
For z=x^y with x<0 and y is irrational, z is not a real number.