Ask
your own question, for FREE!

Mathematics

OpenStudy (anonymous):

Prove that: For all integers n, 21| (3n^7 + 7n^3 + 11n). @MIT 18.01 Single …

Still Need Help?

Join the QuestionCove community and study together with friends!

myininaya (myininaya):

it works for n=1 21|21 ---- assume it is true for some k and now you have to show it is true for k+1

myininaya (myininaya):

for some integer k* for some integer l 21l=3k^7+7k^3+11k now we want to show there is some integer m such that 21m=3(k+1)^7+7(k+1)^3+11(k+1)

OpenStudy (anonymous):

See attached solution

Can't find your answer?
Make a FREE account and ask your own questions, OR help others and earn volunteer hours!

Join our real-time social learning platform and learn together with your friends!

Join our real-time social learning platform and learn together with your friends!

Latest Questions

wikki18:
How did the growth of constitutional monarchy in England differ from the developm

12 minutes ago
6 Replies
0 Medals

doglover12:
Effective communication involves: A. Being able to express what you mean. B. Understanding what is being said to you.

1 hour ago
0 Replies
0 Medals

kobajet:
Layna can paint a 350-square foot room in 4 hours. It takes Bebe 7 hours to paint the same room.

2 hours ago
1 Reply
0 Medals

doglover12:
_____________ is confirming the significance of what another person is feeling.

4 hours ago
2 Replies
0 Medals

jihooncity101:
which atom will pull most strongly on itu2019s valence electrons, sodium or phosp

6 hours ago
0 Replies
0 Medals

rvrccr:
Mr. Lee is reviewing his 2018 property taxes. Use the tax form to complete the statements below.

5 hours ago
1 Reply
0 Medals

jihooncity101:
which atom will pull most strongly on itu2019s valence electrons?

6 hours ago
3 Replies
0 Medals

doglover12:
Match the following definitions with the correct term. Reflective listening Empathizing Encouraging Clarifying Active listening ____ is rephrasing or summar

6 hours ago
13 Replies
0 Medals