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OpenStudy (anonymous):
Identify the 42nd term of an arithmetic sequence where a1 = -12 and a27 = 66. (2 points) 70 72 111 114
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OpenStudy (welshfella):
common difference = (a27 - a1) / 26
OpenStudy (welshfella):
= (66 -(-12) / 26 = 78/26 = ?
OpenStudy (welshfella):
if common difference = d 42nd term = -12 + 41d
OpenStudy (welshfella):
- plug in the value for d you;ve just found
OpenStudy (anonymous):
is the common difference a 3?
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