设log(18)(9)=a log(18)(5)=b ,用ab表示log(36)(45)设log(18)(9)=a log(18)_数学解答

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)

人气：177 ℃　时间：2020-02-22 17:29:27

解答

log18(9)=log9（9）/log9(18)=1/【log9(2)+1】=alog9（2）=1/a-118^b=5log18(5)=b=log9(5)/log9(18)log9(5)=b【log9（18）】=b/alog36(45)=log9(45)/log9(36)=【log9(5)+1】/【2log9（2）+1】=【b/a+1】/【2/a-2+1】...