计算log2 x =7/8 x=_____

计算log2 x =7/8 x=_____ 解方程：log2(x)+log2(x-8)=7 log2^(x^log2^x)=? log2(x^2-3)=5 计算 f(x)=log2(x/8)*log2(2/x) log2(-x)=x+ log2 4+log2 (x+2)怎么算?log2 4+log2 (x+2)=log2 (4x+8) log4(log2^x)=log2(log4^x)求log2^x log2(x+1)+log2(x+8)=3的解集是? log2 (x+1)+log2 x=log6 已知f(x^3)=log2(x),则f(8)=____? 解方程：log2(x+4)+log2(x-1)=1+log2(x+8) log9(log2(8)) = x ,求x log2(x)=-1 log2 (x + 3) + log2(x + 2) = 1log2 (x + 3) + log2(x + 2) = 1 函数f(x)=√（x²-9)/log2(x-1) 的定义域为____ log的计算 ：log2（20）-log4（25)= log3(2)×log2（5）×log5（3）=?log2[log2(32)-log2(3÷4）+log2log的计算 ：log2（20）-log4（25)= log3(2)×log2（5）×log5（3）=?log2【log2(32)-log2(3÷4）+log2（6）】=?lgx+lg（x+15）=2 ..X log2(2x)*log2(x)=2 x=?