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OpenStudy (anonymous):
Help, please!!! What is the sum of a 22-term arithmetic sequence where the first term is 54 and the last term is -30
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OpenStudy (anonymous):
The options are: 264 288 312 336
OpenStudy (akashdeepdeb):
Hahah XD I got mixed up with the numbers!! :D a = 54 n = 22 An = -30 Sum = n/2[a + An] = 11[24] = 264 Understood? :)
OpenStudy (anonymous):
Haha it's okay, and yesss! Thank you!
OpenStudy (akashdeepdeb):
:)
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