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Question

Find the common difference (d) in the following APs respectively.
 

(i)     20, 40, 60, 80, 100,..

(ii)    5, 0, -5, -10, -15, ...

(iii)   2, 2, 2, 2, 2..


  1. -20, -5, 0

  2. 20, -5, 0

  3. -20,5, 0

  4. 20, 5, 0


Solution

The correct option is B

20, -5, 0


Common difference is

(i)  20, 40, 60, 80, 100,

      d= 40-20 =20

(ii) 5, 0, -5, -10, -15, ...

      d= 0-5 = -5

(iii) 2, 2, 2, 2, 2....

      d= 2-2 =0

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