1978 AHSME Problems/Problem 8
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Problem 8
If and the sequences and each are in arithmetic progression, then equals
Solution
WLOG, let and . From the first sequence, we get so From the second sequence, we get so and Thus, we have and So
~JustinLee2017
See Also
1978 AHSME (Problems • Answer Key • Resources) | ||
Preceded by Problem 7 |
Followed by Problem 9 | |
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