Ask
your own question, for FREE!
Mathematics
47 Online
What is the limit in this example? Lim (x+x^2+x^3+....+x^n-n)/(x-1) When X->1 ???
Still Need Help?
Join the QuestionCove community and study together with friends!
Try rewriting the numerator as (x-1) + (x^2-1) + ... + (x^n - 1).
i tried but i only reemplace X?
i cant add -1 unless i add +1 :S because u cant add numbers like that or not?
There is a -n at the end, you are just splitting that into n -1s.
take (x-1) out as common in numerator and cancel from denominator
Still Need Help?
Join the QuestionCove community and study together with friends!
i can do that? i mean i tried but my friend said that i cant do that
of course you can
\[ \frac {x^k - 1} {x-1} = (1 + x + ... + x^{k-1} ) \]
\[(x-1)/(x-1)+(x^2-1)/(x-1)+(x^3-1)/(x-1)+...+(x^n-1)/(x-1)\] Then apply the limit...
x^k?? shouldn't that be x? so i can cancel it?
Still Need Help?
Join the QuestionCove community and study together with friends!
which will come as 1+2+3+...+n
got it clauixx?
yes :D thanks :D:D
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
forgetmylife:
Only the real understand ud83eudd26ud83cudffdu2642ufe0f I'm tired. Tired of the constancy, the constancy of judgment.
rishavraj:
Just trying to find a friend. We met on openstudy, her nickname on there was something "tarantula".
Subshilava:
Which sentence follows correct grammatical conventions? ) u2022 The crow in that bush squawk loudly at the hawks.
9 hours ago
2 Replies
1 Medal
1 hour ago
4 Replies
0 Medals
1 day ago
4 Replies
3 Medals