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)

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设log(18)(9)=alog(18)(5)=b,用ab表示log(36)(45)设log(18)(9)=alog(18)(5)=b,用ab表示log(36)(45)设log(18)(9)=alog

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)
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)

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)
log18(9)=log9(9)/log9(18)=1/【log9(2)+1】=a
log9(2)=1/a-1
18^b=5
log18(5)=b=log9(5)/log9(18)
log9(5)=b【log9(18)】=b/a
log36(45)=log9(45)/log9(36)=【log9(5)+1】/【2log9(2)+1】=【b/a+1】/【2/a-2+1】
=(b+a)/(2-a)

2log(18)(3)=a
log(18)(5)=b
2lg3/lg18=a
lg5/lg18=b