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Topic: I need to demonstrate that 3^80 -2^20 is divisible by 5 . hint u(3^80)=1
Replies: 1   Last Post: Oct 5, 2012 4:13 PM

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lenusv44

Posts: 1
Registered: 10/4/12
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
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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



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