log2^8-16^1/2=_______?感激不尽!

log2(3)×log2(4)=log2(7)?log2(3)×log2(4)=log2(7)吗?log2(1/49)+log2(1/16)+log2(1/27)等于多少呢?帮个忙! (log2 9)/(log2 8) = 2/3(log2 3) log2 (log2 16)=? log2 (x + 3) + log2(x + 2) = 1log2 (x + 3) + log2(x + 2) = 1 计算：（1）log2 (4^3*8^5);(2)log2 3+log2 6-log2 9 (log2) ^2 - log5 *log20课本上 等于 （log2）^2 +(1+log2)(1-log2) = 1;（log2）^2 +(1+log2)(1-log2) 是怎么来的? log2 4+log2 (x+2)怎么算?log2 4+log2 (x+2)=log2 (4x+8) log2(0.2)×log5(8)+10^lg3=______. log2^8-16^1/2=_______?感激不尽! [log2 1]+[log2 2]+[log2 3]+[log2 4]+[log2 5]+...+[log2 1024]=?[x]表示不超过x的最大整数2为底 答案是8204 log2(x^2-2)=log2(10x+8)-1 我算不出来. 2^log2 (3) × log2 (1/8) + 2lg3 2^log2(3)×log2(1/8)+lg4+2lg5 log2(x+1)+log2(x+8)=3的解集是? f(x)=log2(x/8)*log2(2/x) 解不等式log2(4x+8)>log2(2x+1) 解方程log2(2-x)=log2(x-1)+1 解2log2^(x-5)=log2^(x-1)+1