The number is an integer
Posted: Sat Feb 11, 2017 10:46 pm
Prove that the number
$$\mathcal{N}=(2+\sqrt{3})^n +(2-\sqrt{3})^n$$
is an integer.
$$\mathcal{N}=(2+\sqrt{3})^n +(2-\sqrt{3})^n$$
is an integer.
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