, 31.03.2020 00:48, lizziesuks

# 1. Prove that the value of the expression a^2–a is divisible by 2 for...

1. Prove that the value of the expression a^2–a is divisible by 2 for any whole value of a.
2. Prove that the sum of three consecutive exponents of the number 2 is divisible by 14.

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