Problem 150 of 7
Find when the sequence a_n = 50 - 4(n - 1) reaches a_n = 10.
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solve linear or simple exponential sequence equations.
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Target must be exact or a first-threshold condition for a simple arithmetic/geometric rule.
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Solution
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1. Set the sequence rule equal to the target or compare to the threshold.
2. Solve for n or test terms until the threshold is first crossed.
Use the worked steps, then substitute the final answer back into the original relationship to confirm it satisfies the prompt.
Output value when term number is requested.