Sequences and Series · Class 11 · CBSE · Science Mathematics

The sum of the first five terms of the geometric progression 3, -6, 12, -24, ... is:

Practice question from Sequences and Series (Class 11 · CBSE · Science Mathematics), with the correct answer and a step-by-step solution.

medium · MCQ · Q-D3E9E7

The sum of the first five terms of the geometric progression 3, -6, 12, -24, ... is:

  1. A.21
  2. B.27
  3. C.33Correct answer
  4. D.39

Solution

The first five terms are 3,−6,12,−24,483,-6,12,-24,48. Their sum is 3−6+12−24+48=333-6+12-24+48=33.

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