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数学
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log(8)(2)^x加log(7)(1/根号3次49)=1,求x的值
人气:339 ℃ 时间:2020-05-24 00:53:16
解答
log(2^3)2^x=(x/3)log(2)2=x/3
log(7)7^(-2/3)=-2/3
所以
(x-2)/3=1
x=5
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