log 243÷log9 =log3^5÷log3^2 =log3^5-log3^2 然后怎么写

log 243÷log9 =log3^5÷log3^2 =log3^5-log3^2 然后怎么写 log5[log2(log9/log3)]=? log3*2/log9*4=? 方程log3 (x-1)=log9 (x+5) 解方程log3^(x-1)=log9^(x+5) log3(x-1)=log9(x+5) 求x log3(x-1)=log9(x+5)详细过程, log3(x-1)=log9(x-5) 求x log3(x-1)=log9(x+5) 中log9(x+5) 怎么化简? log3(x-1)=log9(x+5) 中log9(x+5) 怎么化简? 已知log3(4)=a,log3(5)=b 则log9(16/25)= 已知log3(4)=a,log3(5)=b 则log9(16/25)= 4log9为底 2的对数-log3为底 32/9的对数+log3为底 8的对数-5的2倍log以5为底3的对数 =多少? log9(x-5)+log9(x=+3)=1 9是那个log的底 log3 5-log3 15+1/2log9 27 的值 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 log4^27×log(8)25×log9^5 log4^27×log(8)25×log9^5