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Manipal MET2017MathematicsSequences and Series

If the n th term of the geometric progression, 5,- 5 2 , 5 4 ,- 5 8 , is 5 1024 , then the value of n is

Options

  1. A11
  2. B10
  3. C9
  4. D4

Correct answer

A. 11

Step-by-step solution

According to the question, 5 (- 1 2 )^ n-1 = 5 1024 (- 1 2 )^ n-1 = (- 1 2 )¹⁰ n-1=10 n=11

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