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OpenStudy (anonymous):
What is the sum of a 52–term arithmetic sequence where the first term is 1 and the last term is 154
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OpenStudy (anonymous):
S=(a1+an).n/2
OpenStudy (anonymous):
a1=1;a52=154;n=52
OpenStudy (anonymous):
okay whats that formula again
OpenStudy (anonymous):
lol
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