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OpenStudy (anonymous):
The 13th term of an arithmatic sequence is 69. The common difference is 7. What is the first term of the sequence?
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OpenStudy (mertsj):
69-12(7)
OpenStudy (anonymous):
show your work please?
OpenStudy (lgbasallote):
An = A1 + (n-1)d you're looking for A1..you're given a certain value in the sequence which is A13 = 69..so n=13 d = 7 can you substitute these values to the variables in the equation?
OpenStudy (amistre64):
that was the work .... its just the sequence in reverse right?
OpenStudy (amistre64):
if the first terms is 69 and the common diff is -7, what is the 13th term? :)
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