For the geometric series a + ar + ar2 + ……. the sum of the first two terms is 24 and the sum to infinity is 27. show that r

Question

Геометрия: For the geometric series a + ar + ar2 + ……. the sum of the first two terms is 24 and the sum to infinity is 27. show that r = ± 1 3

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For the geometric series a + ar + ar2 + ……. the sum of the first two terms is 24 and the sum to infinity is 27. show that r = ± 1 3