若log9 5=a,log3 7=b,则log35 9=______.
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若log95=a,log37=b,则log359=______.若log95=a,log37=b,则log359=______.若log95=a,log37=b,则log359=______.2/(2
若log9 5=a,log3 7=b,则log35 9=______.
若log9 5=a,log3 7=b,则log35 9=______.
若log9 5=a,log3 7=b,则log35 9=______.
2/(2a+b)
因为log3 7 = b,所以log9 7 = b/2
所以log 9 35 = log9 (5*7) = log9 5 + log9 7 = a + b/2
所以log35 9 = 1/(log9 35) = 1/ (a+b/2) = 2/(2a+b)
若log9 5=a,log3 7=b,则log35 9=______.
已知log3(4)=a,log3(5)=b 则log9(16/25)=
已知log3(4)=a,log3(5)=b 则log9(16/25)=
log9 5=a,log3 7=b试用a,b表示log21 35
对数题用a=log3(5),b=log3(7),表示log9(175)=用a=log3(5),b=log3(7),表示log9(175)=求各种精辟回答
log9^5=a,log3^7=b,求log35^9=?
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log9∧5=a,log3∧7=b,试用a,b表示log21∧35
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已知log9 5=a,log3 7=b,试用a,b表示log35 9的值(用a,b表示)
log5[log2(log9/log3)]=?
log3*2/log9*4=?
已知log9 5=a,log3 7=b,试用a,b表示log21 35······
log9(9a+b)=log3√ (ab),求4a+b 的最小值,
已知log9 5=a,log9 7=b,求log35 9的值在线等
已知Log9(8)=a,则Log3(2)=?用a表示
方程log3 (x-1)=log9 (x+5)
解方程log3^(x-1)=log9^(x+5)