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OpenStudy (anonymous):
find the 50th term of the sequences 5, -2, -9, -16,...
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OpenStudy (blurbendy):
A sub n = 12 - 7n. substitute 50 for n
OpenStudy (anonymous):
@blurbendy can you explain how to get this?
OpenStudy (blurbendy):
all the terms have a difference of 7, hence -7n. To get the first number in the sequence, substitute 1 in for n = -7, but we need to get to 5, so add 12.
OpenStudy (anonymous):
got it, thanks for putting everything in logic.
OpenStudy (blurbendy):
np
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