Prove by induction that
is divisible by 11 ..
Last edited by bobak; Feb 26th 2008 at 08:27 AM.
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are you sure?
for n = 1,
Sorry the latex was a bit confusing, I cleaned it up.
Ok, let's assume it holds for n, we'll now show it does so for n+1 is divisible by 11 then
Since (divisible by 11)
and is divisible by 11
It follows that is also divisible by 11
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