于是f(x)=9[log(4,x)]^2-[log(2,x)]^2=9[1/2*log(2,x)]^2-[log(2,x)]^2=5/4*[log(2,x)]^2 怎么得的?

于是f(x)=9[log(4,x)]^2-[log(2,x)]^2=9[1/2*log(2,x)]^2-[log(2,x)]^2=5/4*[log(2,x)]^2 怎么得的? lg(7*2^x+8)>=log(√10) 2^x,求函数f(x)=log(1/2)x*log(1/2)x/4的最小值 [( log(x^2) + log(x^4) )/ log(100 x)] = 4 求X log(0.5x)(2)-log(0.5x^3)(x^2)=log(0.5x^3)(4) f(x)=|log(a)(x)-1|+|2log(a)(x)|,求使f(x)＜2的x范围, （高一）若x满足2(log(1/2)x)^2-14log(4)x+3≤0,求f(x)=[log(2)(x/2)]*{log(√2)[(√x)/2]}的最大值和最小若x满足2(log(1/2)x)^2-14log(4)x+3≤0,求f(x)=[log(2)(x/2)]*{log(√2)[(√x)/2]}的最大值和最小值,并求此时x的值.rt log 9 X/Y=1/2(log 3 X - log 3 Y) log 9 X/Y=1/4 3log 3 X =2log 3 Y find X and Y (log(2)(x))^3-4(log(4)(x))^2+log(16)(x)=0 log(2)(x)log(2)(4x)-3log(2)(x)-12=0 函数f(x)=log(2)(1+x)定义域 求函数f(x)=log[1/2][x^2-4x-5]单调区间 函数f(x)=log（2x-1）(3x-4)的定义域为 若函数f(x)=min{3+log(1/4)x,log(2)x}其中min{p,q}表示两者中较小者,则f(x) log(2)(x+4)=3^x 已知x满足根号2≤x≤8,求f(x)=(log(2)x/4)(log(2)x/2)的最大值与最小值 已知x属于[根号2,8],求f(x)=[log(2)(x/2)乘log(2)(x/4)]最大值,最小值与相应的x的值. 已知log的2次方【log的3次方（log的4次方x)】=log【log的4次方（log的2次方y】=0,求x+y的值设函数f(lgx)的定义域是【0.1,100】,求函数f(x/2)的定义域设函数f(x)=2的-x方,x≤0和f(x)=x的-1/2,x＞0,如果f(x的0次 已知log(2){log(3)[log(4)(x)]}=5^0,则x=?