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I need to demonstrate that 3^80 2^20 is divisible by 5 . hint u(3^80)=1
Posted:
Oct 4, 2012 3:31 PM


Hi ,
would you be so kind to help me with the maths problem , please ?
I need to demonstrate that 3^80 2^20 is divisible by 5 .
I have this hint u(3^80)=1 but I don't get it .
Thank you
kind regards



