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ridgeboy36
 3 years ago
What is the sum of a 6term geometric series if the first term is 8 and the last term is 134,456 ? Answers to choose from.
a)129,513
b)130,624
c)156,864
d)172,846
ridgeboy36
 3 years ago
What is the sum of a 6term geometric series if the first term is 8 and the last term is 134,456 ? Answers to choose from. a)129,513 b)130,624 c)156,864 d)172,846

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cwrw238
 3 years ago
Best ResponseYou've already chosen the best response.1let the first term = a then 6th term =ar^5 where r = common ration can you find r from this information?

ridgeboy36
 3 years ago
Best ResponseYou've already chosen the best response.0i might need some guidance but let me try!

ridgeboy36
 3 years ago
Best ResponseYou've already chosen the best response.0i really dont know how i got this but i ended up with 832 as the common ratio.

cwrw238
 3 years ago
Best ResponseYou've already chosen the best response.16tt term = 134456 = ar^5 ist term = 8 so ar^5/a = r^5 = 134456/8 = 16807

cwrw238
 3 years ago
Best ResponseYou've already chosen the best response.1you can now find the sum of the 6 terms by plugging in the values of a and r into the formula sum = a * r^n  1  r  1

ridgeboy36
 3 years ago
Best ResponseYou've already chosen the best response.0ohh i see what i di wrong !! i was way off

cwrw238
 3 years ago
Best ResponseYou've already chosen the best response.1the value of n (number of terms) is 6

ridgeboy36
 3 years ago
Best ResponseYou've already chosen the best response.0okayy i got c)156,864
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