log(9)(a)=log(15)(b)=log(25)(a+2b),求b比a的值log(9)(a)=log(15)(b)=log(25)(a+2b),其中9,15和25是底数

log(9)(a)=log(15)(b)=log(25)(a+2b),求b比a的值log(9)(a)=log(15)(b)=log(25)(a+2b),其中9,15和25是底数 已知lg2=a lg3=b 求log(4)12+log(2)15=log(8)9=log(3)32= log(a)(b)=log(c)(b) /log(c)(a) 怎么证log(a)(b)=log(c)(b) /log(c)(a)怎么证 已知log(2)^3＝a,log（3）^5=b,试用a,b表示log(15)^20 公式：log(a)(b)*log(b)(a)=? 求证 log(a)^(b)=1/log(b)^(a)求证 log(a)^(b)=1/log(b)^(a) 设log(18)(9)=a log(18)(5)=b ,用ab表示log(36)(45)设log(18)(9)=a log(18)(5)=b ,用ab表示log(36)(45) matlab中合并对数?如何实现log(a)-log(b)=log(a/b) 证明log^a+log^b=log^(a+b)要过程 log(a)b=log(c)b/log(c)a 是怎么推算来的 Log(2)1/25•log(3)1/8•log(5)1/9化简 还有已知log(18)9=a,log(18)5=b求log(36)45 值 2log(b)x=log(a)x+log(c)x求证,c^2=(ac)^[log(a)b] log(a)*log(b)=啥啊,忘记公式了啊 别告诉我等于log(b)*log(a) 对数函数题 log a - log b = 3 log (c/2) 求 a = ______________ log(2)5=a,log(2)7=b用ab表示log(35)28 log a b*log b c=log b b*log a c成立吗中间的字母是写在下面的 相当于log的脚码 可以说log a x +log a y=log a 已知a=log₂3+log₂√3,b=log₂9-log₂√3,c=log₃2,则a,b,c的大小关系是?