若log9x*log43=(log34+log43)^2-(log43/log34+log34/log43),則x=多少
若log9x*log43=(log34+log43)^2-(log43/log34+log34/log43),則x=多少
數(shù)學人氣:581 ℃時間:2020-07-01 07:52:47
優(yōu)質解答
log9x*log43=(log34+log43)^2-(log43/log34+log34/log43)log9x*log43=(log34)²+(log43)²+2-[(log34)²+(log43)²]log9x*log43=2log9x=2log341/2log3x=log3 16x^(1/2)=16x=256
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