composite numbers

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September 10th 2009, 12:38 PM
dori1123

composite numbers

If $a, b \in \mathbb{N}$ and $2 \leq b \leq a$ , then $a!+b$ is composite. Can I get some help with this?
September 10th 2009, 12:52 PM
dori1123

Never mind, I got it.

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