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prove that for x is an odd, positive integer, 3x ??1 (mod 4). I'm not sure...

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Advance Math

prove that for x is an odd, positive integer, 3x ??1 (mod 4).I'm not sure how to approach the problem. I thought to assume thatx=2a+1 and then show that 3^x +1 is divisible by 4 and thuscongruent to 3x=-1(mod4) but I'm stuck.

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Since is an odd integer sothere exist an integer such that To show that we need to prove that 4 divides Now Now we will use induction onto    See Answer
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