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Infinite geometric series

AP.CALC: LIM‑7 (EU), LIM‑7.A (LO), LIM‑7.A.3 (EK), LIM‑7.A.4 (EK)
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Problem

If the following infinite geometric series converges, find its sum.
5, plus, start fraction, 15, divided by, 4, end fraction, plus, start fraction, 45, divided by, 16, end fraction, plus, point, point, point
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