Prove that n13 − n is divisible by 2, 3, 5, 7 and 13 for any integer n.Is it
divisible by 4 or 9?
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A symbol is a mark, sign, or word that indicates, signifies, or is understood as representing an idea, object, or relationship. Symbols allow people to go beyond what is known or seen by creating linkages between otherwise very different concepts and experience
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