设x=log2 3,求(2^3x-2^3x)/(2^x-2^-x)

设x=log2 3,求(2^3x-2^3x)/(2^x-2^-x) log2(x)=-2/3,求x log2 (x + 3) + log2(x + 2) = 1log2 (x + 3) + log2(x + 2) = 1 设f(log2 X)=2^x,则f(2log2 3）= |[log2(x)]^2-3log2(x)+1| log2[(x-14)(x-2)]=3+log2(6-x).求x?. F(X)=|X|+|X-2| 求F(log2 3) 设集合M={x||x-8|N={x||log2(x-2)-3| 设f(x)=log2(x^2-3x+4),则f(x)的定义域 求解log2(3x)=log2(2x+1) 解方程log2(x+14)-log2(x+6)=3-log2(x+2) log1/3 3 =2log2 x 求x 求y=log2(3-2x-x^2)值域 已知log3(2) =log2(3)^x .求x f[log2(x)]=2^x,求f(3) 求y=(log2 x-2)(1/2 log2 x-3)(2 求y=log2^x(log2^4x^2)+3的值域 设(log2＾x)=2＾x (x>0),则f(3)的值是