[求助]math

jackco

G friends, please tell me how to solve "f(n)=2^x*3^y*5^z,x/y/z为n的百,十,个位，x，y，z都是正整数，f(m)=9f(v),
问m-v=?  especially the clues to solve the problem, thanks a lot!
[em27]

猫猫头

参阅前JJ，我有详细过程：P

jackco

小石猫, please tell me again, I couldn't find the previous JJ, thank you very much. Also, could you tell me the password of  9-month JJ, I could not open it without the password. thanks again.

猫猫头

因为f(m)=9f(v),所以f(m)中3的次数比f(v)中多2（3^2)
所以设f(n)=2^x*3^y*5^z,f(v)=2^x'*3^y'*5^z'
coz y'-y=2===>100x+10y+z-100x'-10y'-z'=10*2(pay attention that x=x',z=z')

jackco

小石猫, I got it, thank you very much!!

猫猫头

不客气，你得叫我猫猫头

jackco

猫猫头, thank you again, but could you tell me how to open the 9-month JJ?
I downloaded it, but I could not open it without password, where can I find the password? please help me get out of the trouble. thanks.

猫猫头

在VIP会员下载讨论里有

jackco

猫猫头,I can't get in the VIP area you said, what's wrong with me? could you tell me password? thanks a Lot!

猫猫头

你去问ROBERT要吧，你给他发短消息，这是他管的