X=log2^3 求（2^X－2^-X）/（2^3X－2^-3x）的值

log2(x)=-2/3,求x log2 (x + 3) + log2(x + 2) = 1log2 (x + 3) + log2(x + 2) = 1 log2[(x-14)(x-2)]=3+log2(6-x).求x?. F(X)=|X|+|X-2| 求F(log2 3) 若1/2≤log2底x≤3,求函数y=（log2底x－1）.（log2底x－2）的值域 |[log2(x)]^2-3log2(x)+1| 已知函数f(x)=log2^ ( x/4 ) ×log2^ (2x) (1)解不等式f(x)>0;(2)当x∈【1,4】时,求f(x)的值域f（x）=log2（2x）×log2（x／4）＝[（log2 2）+(log2 x)] ×[(log2 x) -(log2 4)]=[1+(log2 x)] ×[(log2 x) -2]=(log2 x)² - (log2 x) -2 一题高一函数求值域y=(log2(底数)x)^2-3log2(底数)x-3log2（底数）x+5,x∈[2,8]值域 已知x满足不等式2[log2(x)]^2-7[log2(x)]+3≤0,求函数f（x）=[log2(x/2)]*[log2(x/4)]的最大最小值. 求解log2(3x)=log2(2x+1) 求y=log2(3-2x-x^2)值域 log1/3 3 =2log2 x 求x 已知log3(2) =log2(3)^x .求x f[log2(x)]=2^x,求f(3) 设x=log2 3,求(2^3x-2^3x)/(2^x-2^-x) 解方程log2(x+14)-log2(x+6)=3-log2(x+2) 已知函数f(x)=log2(2-x)+log2(2+x)求f(x)的定义域 |2x-log2^x|