log2 5 x log2 5等于log2 25还是什么?

log2 5 x log2 5等于log2 25还是什么? log2 3/log2 5等于log2 3-log2 5么? log根号2^（x-5）log2^(x-1) log根号2^(x-5)-log2^(x-1) log2 50-2log2 5 等于多少? 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-x) log2 (5-x) log2(5-x) log2(5-x) 解方程：log2(9^x - 5)=log2(3^x - 2)+2解方程log2(9^x - 5)=log2(3^x - 2)+2希望有详细过程.注：log2中的2为log的下标 log2(x – 2 ) + 2 = log2(5)log2(x – 2 ) + 2 = log2(5) log2(x – 2 ) + 2 = log2(5)log2(x – 2 ) + 2 = log2(5) log2.5 625等于多少? 2log2 5等于多少? log2 5/4+log2 5 log2 20---log2 5+log3 4 * log4 3 等于什么 log(1/2)(x^2-5x-6)>log2{1/[2(x+6)]}