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Mathematics 16 Online
OpenStudy (anonymous):

What is the sum of a 6–term geometric series if the first term is 6 and the last term is 1,000,842? 188,851 157,962 138,073 117,648

OpenStudy (experimentx):

do you mean there are only six terms?

OpenStudy (anonymous):

Yes

OpenStudy (experimentx):

the sum must be greater than the last term !! did you make some typo there?

OpenStudy (anonymous):

Nope . Checked and recheked ....may be the function is negative

OpenStudy (experimentx):

t6 = 6 r^5 1,000,842 = 6 r^5 http://www.wolframalpha.com/input/?i=1%2C000%2C842+%3D+6+r^5

OpenStudy (experimentx):

find the value of r from here. okay ... and you have this formula |dw:1345155450542:dw| i think using this formula .. you can find it;s sum

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