log2(3)×log2(4)=log2(7)?

log2 3×log3 7=log2 7 (log2 9)/(log2 8) = 2/3(log2 3) 2^(log2^(-3))= log2 3/log2 5等于log2 3-log2 5么? log2 5/4+log2 5 log2^x >= log4^(3x+4) (log3^4+log5^2)(log2^9+log2^根号3) log2 (x + 3) + log2(x + 2) = 1 已知满足不等式2log2(x)-7log2(x)+3≤0,求函数f（x）=[log2﹙x/2﹚][log2﹙x/4﹚]的 4^log2 3等于多少? (log8 9/log2 3)=? 根号下[(log2^3)^2-4log2^3+4]+log2^(1/3)