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OpenStudy (anonymous):
What is the sum of the arithmetic sequence 140, 135, 130…, if there are 35 terms?
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OpenStudy (anonymous):
help please choices 1,870 1,925 2,040 2,125
OpenStudy (saifoo.khan):
Find the first term first.
OpenStudy (anonymous):
goes up 5
OpenStudy (anonymous):
idk ?
OpenStudy (anonymous):
There is less than 35 terms in the sequence, but if negative number is also considered: (140+140-34*5)*35/2=1925
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OpenStudy (anonymous):
ok thanks
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