+0  
 
+1
170
1
avatar+217 

delete

 Jun 25, 2018
edited by yasbib555  Jun 25, 2018
 #1
avatar+27310 
+1

When the two are equal then n = 6, so n+7 = 2n+1 = 13.  Since 13 is prime this is the gcd.  It is easy to check that smaller values of n result in a gcd of 1.  

 Jun 25, 2018

4 Online Users

avatar
avatar

New Privacy Policy

We use cookies to personalise content and advertisements and to analyse access to our website. Furthermore, our partners for online advertising receive information about your use of our website.
For more information: our cookie policy and privacy policy.