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OpenStudy (anonymous):
help please! check out attachment in the comment box for the question isn't it C.?
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OpenStudy (anonymous):
sam (.sam.):
The first term, \(a_1\) is -10 and the common difference, d is 5, sub it in what do you get?
OpenStudy (anonymous):
5!
OpenStudy (anonymous):
oops! -15?
sam (.sam.):
\[a_n=a_1+(n-1)d \\ =-10+(n-1)5 \\ =-10+5n-5 \\ =?\]
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OpenStudy (anonymous):
so its 5n - 15 ? @.Sam.
sam (.sam.):
Yup
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