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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
 one year ago
 one year 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
 one year ago
 one year ago

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cwrw238Best ResponseYou've already chosen the best response.1
let the first term = a then 6th term =ar^5 where r = common ration can you find r from this information?
 one year ago

ridgeboy36Best ResponseYou've already chosen the best response.0
i might need some guidance but let me try!
 one year ago

ridgeboy36Best ResponseYou've already chosen the best response.0
i really dont know how i got this but i ended up with 832 as the common ratio.
 one year ago

cwrw238Best ResponseYou've already chosen the best response.1
6tt term = 134456 = ar^5 ist term = 8 so ar^5/a = r^5 = 134456/8 = 16807
 one year ago

cwrw238Best ResponseYou've already chosen the best response.1
you 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
 one year ago

ridgeboy36Best ResponseYou've already chosen the best response.0
ohh i see what i di wrong !! i was way off
 one year ago

cwrw238Best ResponseYou've already chosen the best response.1
the value of n (number of terms) is 6
 one year ago

ridgeboy36Best ResponseYou've already chosen the best response.0
okayy i got c)156,864
 one year ago
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