log2^5乘以log5^2等于多少?

log2^5乘以log5^2等于多少? log2/log5等于多少 log2 5乘log5 4等于多少 2log5(25)+3log2(64)-8ln1等于多少 2log5 25＋3log2 64等于多少 5^log5(2)-4^log2(3)+3^log27(8)等于多少?(1)5^log5(2) - 4^log2(3) + 3^log27(8)等于多少?(2)开更号[lg2 (1/3) - 4lg(3) + 4 + lg(6) - 2^(-1)]等于多少? log2^3乘以log3^2等于多少? lg8*log2(5)*log5(4)得多少? 2log5 10+log5 0.25等于多少? 设log5 7=a,（5为底数）,log2 5 =b ,（2为底数）,则log2 7 等于多少,（2为底数） 5^2log5^10-1等于多少? (log5(10))^3-(log5(2))^3-3log5(10)*log2(5) lg(1/4)-lg2(5) 2log5(10)+log5(0.25) 2log2(25)-3log2(64) log2(log2(16) ) log2 50-2log2 5 等于多少? (log5根号2乘以log7 9)除(log5 3分之1乘log7 3倍的根号4)+log2(根号(3+根号5)—根(3-根号5)) 2log5^25–3log2^64等于? log2 3乘以log2 3等于2log2 (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?