log(3)5加上log(5)3减去log(3)15乘以log(5)15等于多少
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log(3)5加上log(5)3减去log(3)15乘以log(5)15等于多少log(3)5加上log(5)3减去log(3)15乘以log(5)15等于多少log(3)5加上log(5)3减去lo
log(3)5加上log(5)3减去log(3)15乘以log(5)15等于多少
log(3)5加上log(5)3减去log(3)15乘以log(5)15等于多少
log(3)5加上log(5)3减去log(3)15乘以log(5)15等于多少
log(3)15*log(5)15
=log3(3*5)*log5(3*5)
=(log3(3)+log3(5))*(log5(3)+log5(5))
=(1+log3(5))*(log5(3)+1)
=1+log3(5)*log5(3)+log3(5)+log5(3)
=1+(ln3/ln5)*(ln5/ln3)+log3(5)+log5(3)
=2+log3(5)+log5(3)
log(3)5+log(5)3-log(3)15*log(5)15=-2
用换底公式变为lg5/lg3+lg3/lg5-(lg15)^2/(lg3*lg5)
通分化简有((lg5)^2+(lg3)^2-(lg15)^2)/(lg3*lg5)
因为lg5+lg3=lg15
化简上式可得-2
log(3)5加上log(5)3减去log(3)15乘以log(5)15等于多少要过程
log(3)5加上log(5)3减去log(3)15乘以log(5)15等于多少
[log(5)8]*[log(32)5]+log(9)8/log(3)2
求等式log(2)3*log(3)4*log(4)5*log(5)6*log(6)7*log(7)m=log(3)9时m的值?
求值:(log(4)3+log(8)3)×(log(3)2+log(9)2)+log(2)(2^5)¼
log(x+5)=log(x)+log(2) log(8)+log(x)=log(24) 2log(x)=log(2x)+log(3)
5/6log(2)3*3/2log(3)2
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