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OpenStudy (anonymous):
What is the 25th term of the arithmetic sequence where a1 = 8 and a9 = 48 ?
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OpenStudy (anonymous):
128: 8, 8+5, 8+ 2(5), ... 8+ (n-1) 5; n=25, n-1= 24; 8 +24(5)= 8 + 120 = 128; I have forgotten the formula; I'd have to work it out.
OpenStudy (anonymous):
THANKS!!!
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