log2 5/4+log2 5=多少,

log2 5/4+log2 5=多少, log2 5/4+log2 5 4^log2^5= 多少 过程? 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 50-2log2 5 等于多少? [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^(4^7*2^5)+log2^6-log2^3 log2^5+3= log2(x – 2 ) + 2 = log2(5)log2(x – 2 ) + 2 = log2(5) log2(x – 2 ) + 2 = log2(5)log2(x – 2 ) + 2 = log2(5) 计算：（1）log2 (4^3*8^5);(2)log2 3+log2 6-log2 9 log2 3/log2 5等于log2 3-log2 5么? log2 5乘log5 4等于多少 lg8*log2(5)*log5(4)得多少? 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 log2.5 625等于多少? 2log2 5等于多少? 4的1/2(log2底9-log2底5)的次方等于多少?