已知2a加b减1等于0求9的3a次方乘27的b次方
人气：135 ℃ 时间：2019-10-17 06:40:38
解答
2a+b-1=0
2a+b=1
9^(3a)*27^b
=3^6a*3^3b
=3^[3(2a+b)]
=3^3
=27
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