If the sum of an infinitely decreasing GP is 3, and the sum of the squares of its terms…

Mathematics · JEE Main · NTA ExamsProgression and Series

If the sum of an infinitely decreasing GP is 3, and the sum of the squares of its terms is 9/2, the sum of the cubes of the terms is
  1. 105/13
  2. 108/13
  3. 729/8
  4. none of these

Answer

(B) 108/13

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