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OpenStudy (anonymous):
What is the sum of the arithmetic sequence 22, 13, 4 if there are 28 terms
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OpenStudy (anonymous):
okay a =22 , d = 9 ,n=28 s = n/2(2a + (n-1)d)
OpenStudy (anonymous):
how do you get the answer with that formula? i got somthing so differnt
OpenStudy (dumbcow):
just substitute the correct values into the formula: n = 28 a=22 d= -9
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