Find for what values of natural n
the expression n3 - 7 is divisible by (n-1).
No Euclidean division!
Answer Submission Is Not Available
thank you for your replies to the May Problem.
The first to send a correct solution was Emmanuelle.
Congrats to her!
Here is my solution:
n3 -7=( n3 -1)- 6.
So (n-1) is a factor of 6 and is equal to 1,2,3,6.
Thus n can be equal to 2,3,4,7
Thank you again and let's try the June Problem.