已知log a (xy)==√2,log a (ay)=2 求log a x的值
log(8)a+log(4)b^2=5,log(8)b+log(4)a^2=7,求log(2)ab的值
x=log a 2
计算题(log)已知log底数5 ^2=a,log底数5 ^3=b求log底数5根号54 的值
[log (底数为a) x]=[1\2log (底数为a) b ] - [ log (底数为a)c]求X
已知log(a)x=2,log(b)x=3,log(c)x=6,求log(abc)x的值(括号里的为底数,外面的是真数)
已知a大于b大于1,log(a)b+log(b)a=10/3,求log(a)b-log(b)a的值
已知a<b<1,log(a)b+log(b)a=10/3,求log(a)b-log(b)a的值
2log(b)x=log(a)x+log(c)x
对数函数题 log a - log b = 3 log (c/2) 求 a = ______________
已知函数f(x)=log a (-x^2+log 2a x).若f(x)在(0,0.5)有意义,求a的取值范围.
对数的运算问题-log a 1/x=-(log a 1-log a x)=log a x
已知log(8)27=a,求log(6)16