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April 21, 2015

April 21, 2015

Posted by **Vincent** on Wednesday, September 8, 2010 at 4:58am.

5^n + 3 is divisible by 4.

- Calculus -
**Damon**, Wednesday, September 8, 2010 at 5:21am5^0+3 = 4

5^1 +3 = 8

5^2+3 = 5*5^1 + 3 = 4*5^1 +5+3 =28

5^3+3 = 5*5^2 + 3 = 4*25 + 5+3 = 128

5^(n+1) + 3 = 5 * 5^n + 3

= 4 *5^n + (5^n+3)

ah ha

4*5^n is divisible by 4 and so is (5^n+3)

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