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OpenStudy (anonymous):
Find an equation for the nth term of the arithmetic sequence. a19 = -58, a21 = -164
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OpenStudy (solomonzelman):
\(\Large\color{black}{ a_{19} +2d=a_{21} }\) \(\Large\color{black}{ -58+2d=-164 }\) can you find the difference?
OpenStudy (anonymous):
a|dw:1415115866368:dw|
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