解log81(X)+log9(X)+log3(X) < 7/4
(log2(3)+log8(9))x(log3(4)+log9(8)+log3(2))
填空题:方程log3(x-1)=log9(x+5)的解是____________
若log2^3×log3^4×log4^x=log9^3 ,求x
(log2^3 +log3^5) x ( log3^5 +log9^5 ) x lg 2 ,
求x,y值.6log9^x+3log27^y=8log3^x+2log9^y=2
解不等式(2+log3 x)log3 x>log3 (9x)
由换底公式怎么得到log9(x+5)=log3[2(x+5)]=1/2log3(x+5)
Log2⒊log3⒋log4ⅹ=log9⒊求x的值
高一数学题 设函数f(x)=2^-x,x小于等于1 f(x)=log81^x x大于一 则满足f(x)=4分之一的x的解
解不等式:log3^(5+x)+log3^(x-1)≤3
解不等式:log3(x+1)
解不等式:log3/4(x+1)>log4/3(x-3)