Hey you all,

I hope you have better mathematical skills than me. I only study math at a low level since i am study to become a teacher. Sadly, this leaves me with only having a basic knowledge and this is probably why I am stuck with this both problems I have been given to solve and my pass and grade depens on it. But i am stuck and becoming desperate, so i hope there is someone who can help me solving it. I don't necessary need to know the whole solution. But maybe some tips and idications how i will solve it. Thank you all so much.

(by the way I hope i use the right mathematical language, cos i am only used to the german words in the mathematical sense)

So these are my problems:

1) Determine the rest of

when divided by 7.

2) Prove that

for all n, k