f(x)=(ln x^3)/x and if f(1)=0, then f(9)=?

2018-11-28 5:38 pm

回答 (2)

2018-12-01 11:03 am
f(x)=(ln x^3)/x and if f(1)=0,then f(9)=?
Sol
f(1)=(ln1^3)/1=0^3/1=0
f(9)=(ln9^3)/9=3ln9/9=6ln3/9=2ln3/3
2018-11-28 5:40 pm
6ln(3)


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