log2(x)=-2/3,求x

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?. log4(log2^x)=log2(log4^x)求log2^x F(X)=|X|+|X-2| 求F(log2 3) 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 求解log2(3x)=log2(2x+1) |[log2(x)]^2-3log2(x)+1| 解方程log2(x+14)-log2(x+6)=3-log2(x+2) 设x=log2 3,求(2^3x-2^3x)/(2^x-2^-x) 已知函数f(x)=log2(2-x)+log2(2+x)求f(x)的定义域 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y=[log2(x)]^-3log2(x^2)+3,求x∈[1,2]的值域