Can 7 divide 3^(2n+1) + 2^(n+2) in induction for number theory?

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SUMMARY

The discussion focuses on proving that 7 divides the expression 3^(2n+1) + 2^(n+2) using mathematical induction. The base case for n=1 has been established, and the next step involves showing that if the statement holds for n=k, it also holds for n=k+1. The inductive hypothesis is that 7 divides 3^(2k+1) + 2^(k+2), which is crucial for progressing to the next case.

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mcooper
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Homework Statement



Show 7 divides 3^(2n+1) + 2^(n+2)

The Attempt at a Solution



Have proved base case K=1 and for the case k+1 I have got ot the point of trying to show 7 divides 9.3^(2k+1) + 2.2^(k+2).

Any pointers would be much appreciated. Thanks in advance
 
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Well, you don't seem to have even stated the inductive hypothesis yet, let alone tried doing something with it.
 
The inductive hypothesis is that 7 divides 3^(2k+1) + 2^(k+2)
 

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