(1-x) (x^2-x^3) ... (-1)^n(x^n) : Write in sigma notation

label Mathematics
account_circle Unassigned
schedule 1 Day
account_balance_wallet $5

(1-x) + (x^2-x^3) +...+(-1)^n(x^n) : Write in sigma notation.

I have tried everything I can think of but i can't seem to get it. 

Nov 19th, 2014

Answer:


S = summation from 1 to k of ( (-1)^k* x^k ) 

S = [(-x)^(n+1) - 1 ] / (-x - 1) = [ 1 - (-x)^(n+1) ] / (1 + x)


Please choose as the best. Thank you!


Nov 19th, 2014

Did you know? You can earn $20 for every friend you invite to Studypool!
Click here to
Refer a Friend
...
Nov 19th, 2014
...
Nov 19th, 2014
Sep 22nd, 2017
check_circle
Mark as Final Answer
check_circle
Unmark as Final Answer
check_circle
Final Answer

Secure Information

Content will be erased after question is completed.

check_circle
Final Answer