log18 9=a,
18^b=5----->log18 5=b
log(36)45
=log(18) 45/log(18)36
=[log(18) 9+log(18) 5]/[log(18)18+log(18)18-log(18) 9]
=(a+b)/(2-a)
不懂的欢迎追问,
log18 9=a,
18^b=5----->log18 5=b
log(36)45
=log(18) 45/log(18)36
=[log(18) 9+log(18) 5]/[log(18)18+log(18)18-log(18) 9]
=(a+b)/(2-a)
不懂的欢迎追问,