Ask
your own question, for FREE!

Mathematics
91 Online

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

Nickblade10:
Plz Help: What are the vertical asymptotes of the function f(x) = the quantity of

2 minutes ago
11 Replies
0 Medals

mayathegamergrl:
whats something that is a waste of time to get for a gaming room/setup?

38 minutes ago
42 Replies
1 Medal

TotallyNotJay:
I need help with this question smh.. write a sentence that uses the word accolade

9 hours ago
4 Replies
1 Medal

Myrna123:
Julia has $80. She wants to purchase a nail paint set for $16 and earrings. She spends the rest of the money on earrings.

10 hours ago
0 Replies
0 Medals

AxL1nna:
Your friend Aria is complaining that programming seems too complicated. She says, u201cWhy do we need things like sequence, selection, iteration, and variab

13 hours ago
0 Replies
0 Medals