is divisible by 11 Is this correct?
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Originally Posted by dwsmith is divisible by 11 Is this correct? Yes this is correct. Another way you could've gone is to apply the divisibility rule for 11.
Correct!
is : or credit to Mr. chiph588@
This is how I would do it: On expanding the RHS with the binomial theorem, we see that it is indeed divisible by 11.