对数有什么运算性质
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对数有什么运算性质
基本性质
如果a>0,且a≠1,M>0,N>0,那么:
1、a^log(a)(b)=b
2、log(a)(a)=1
3、log(a)(MN)=log(a)(M)+log(a)(N)
4、log(a)(M÷N)=log(a)(M)-log(a)(N)
5、log(a)(M^n)=nlog(a)(M)
6、log(a)[M^(1/n)]=log(a)(M)/n
(注:^均为上标符号,例:a^1即为a)
7、换底公式:
log(a)(N)=log(b){N}÷log(b){a}
8、log(a){b}=1/log(b){a}
如果a>0,且a≠1,M>0,N>0,那么:
1、a^log(a)(b)=b
2、log(a)(a)=1
3、log(a)(MN)=log(a)(M)+log(a)(N)
4、log(a)(M÷N)=log(a)(M)-log(a)(N)
5、log(a)(M^n)=nlog(a)(M)
6、log(a)[M^(1/n)]=log(a)(M)/n
(注:^均为上标符号,例:a^1即为a)
7、换底公式:
log(a)(N)=log(b){N}÷log(b){a}
8、log(a){b}=1/log(b){a}