For n>(or equal to) 1, use a congruence theory to prove
27 divides 2^(5n+1) + 5^(n+2)
43 divides 6^(n+2) + 7^(2n+1)
Follow Math Help Forum on Facebook and Google+
Note that: and try to go on from there
Last edited by PaulRS; Nov 3rd 2009 at 04:08 AM.
View Tag Cloud