若ab为有理数,且满足a-3的绝对值=（b+2)平方=0求b的a次方的值?
人气：480 ℃ 时间：2019-08-18 21:24:13
解答
a-3的绝对值=（b+2)平方=0
则a-3=0 b+2=0
则a=3 b=-2
b的a次方=(-2)3次方=-8
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