If \(r\) is a constant and \(a_n=rn\) for all positive integers \(n,\) for how many values of \(n\) is \(a_n<100?\)

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If \(r\) is a constant and \(a_n=rn\) for all positive integers \(n,\) for how many values of \(n\) is \(a_n<100?\)

(1) \(a_{50}=500\)

(2) \(a_{100}+a_{105}=2050\)

Answer: D

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