Arithmetic and Geometric Progressions

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Sum of a Sequence

    Find sum :
    1. 6530
    2. 3600
    3. 2850
    4. 3850

 

  • Correct Answer
    Choice D. 3850

Detailed Solution

The series is in the form

Then
Substituting n = 10 will give the sum of the series. Thus

Correct Answer: 3850



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More questions from Progressions

  1. Counting and Progressions
  2. Common Ratio
  3. Common Difference
  4. Sum up to 'n' Terms
  5. AP Puzzle
  6. GP Logical Puzzle
With some simple but very powerful ideas, one can cut down on a lot of working when it comes to progressions. For example, anchoring a progression around its middle term can be very useful. Reinforce these ideas with these questions.