I need help with an algebra problem

Algebra
Tutor: None Selected Time limit: 1 Day

Nov 30th, 2015

Thank you for the opportunity to help you with your question!

a)We have the sequence as 

5(1+.5+.5^2+.5^3+.5^4+.5^5)

Here the sequence is in geometric progression with common ratio =.5

The first term is 1

So

 =155/16 (as a fraction)

b)The term here are can be found out by substituting the value of j=1,2,...9

-4,-4^2,-4^3

So the sum =>-4+(-4)^2+(-4)^3+-------(-4)^9

  So here the first term is -4 and total number of term =9

Common ratio,r=-4


Please rate my answer so that I can further help you in the future.Thanks
Nov 30th, 2015

I am being told that the 1st sum, 155/16  is wrong

Nov 30th, 2015

correct answer was  315/32

Nov 30th, 2015

Are you studying on the go? Check out our FREE app and post questions on the fly!
Download on the
App Store
...
Nov 30th, 2015
...
Nov 30th, 2015
Dec 7th, 2016
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