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log7[log3(log2x)]=log5tan45°
则x^(-1/2)=?
人气:461 ℃ 时间:2020-03-27 17:33:33
解答
log5tan45°
=log5 1=0
log7[log3(log2x)]=0
log3(log2x)]=1
log2 x=3
x=8
x^(-1/2)=8^(-1/2)=√2/4
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