证明不等式1/(log5(19))+(2/log3(19))+(3/log2(19))

问题描述:

证明不等式1/(log5(19))+(2/log3(19))+(3/log2(19))

数学人气:638 ℃时间:2020-03-29 09:42:20
优质解答
1/(log5(19))+(2/log3(19))+(3/log2(19))
=log19(5)+2*log19(3)+3*log19(2)
=log19(5*9*8)=log19(360)

1/(log5(19))+(2/log3(19))+(3/log2(19))
=log19(5)+2*log19(3)+3*log19(2)
=log19(5*9*8)=log19(360)