1/2^(log2(12))怎么算?

1/2^(log2(12))怎么算? log2 SQR(7/48)+log2 12 -1/2log2 42 log2 SQR(7/48)+log2 12 -1/2log2 48 (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*1/25怎么算 [log2(3)]^2怎么算? log2根号2怎么算? 2log2（12）怎么转化成log2（3）? 求值：log2 (5/56)^(1/2)+log2 (14)-(1/2)log2 (35)=log2中2为底数=1/2[-2log2 (7)-3]+log2 (2)+log2 (7) 中的1/2[-2log2 (7)-3]是怎么得到的？ f(log2 1/3)=-(2^(-log2 1/3)-1)=-2 怎么算就是 -(2^(-log2 1/3)-1)=-2 是怎么来的 2^[log2(1/3)]=1/3怎么算, 1/2的LOG2的24次方怎么算 （1/2）的（log2[3]）怎么算啊 (1/2)^(log2^ 3)怎么算 等于多少 过程 =[1/(log2 3)+lg2 3]²-[1/(log2 3)]²-(log2 3)²=2*(1/log2 3)*log2 3,怎么转的啊 log2 56-log2 7怎么算来着? 2^log2^8/3怎么算