Prove that, for any positive integer n, 3^3n+1 + 2^n+1 is always divisible by 5.
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Originally Posted by bearej50 Prove that, for any positive integer n, 3^3n+1 + 2^n+1 is always divisible by 5. For n= 1, that says is divisible my 5 which is true. Assume that, for some positive integer k, is a multiple of 5. That is, that for some integer i. "Add and subtract" to get which is 5 times an integer.
thank you so much
Hello, bearej50! Prove that, for any positive integer is always divisible by 5. We have: . . . . . Therefore, is divisible by 5.
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