2log2〈π〉=多少

2log2〈π〉=多少 log2 5/4+log2 5=多少, log2 50-2log2 5 等于多少? 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! 若log2 36=a,log2 10=b,则log2 15等于多少2是底数快 log2（2^x+1)log2(2^(x+1)+2)=2的解为多少 (log2 9)/(log2 8) = 2/3(log2 3) log2^2等于多少log2^1等于多少 log2(1/2)等于多少 log2^(1/2)等于多少 log2√2等于多少 2log2 5等于多少? 2log2^3等于多少? 2log2 10—log2 25=? 2log2^3+4log2^3等于多少啊 急 log1/2(log2(3)=多少高一的数学.. 2log2^3= 2^log2(20)=?