Respuesta :

saltedpasta
They’re both arithmetic because the pattern for the first one is add 2, and second is add 3. As long as you can see a pattern of addition or subtraction for the whole thing then it is arithmetic.

Step-by-step explanation:

  • 15, 13, 11, 9, .....
  • Here, the common difference is 2 and same in all the cases:
  • 13 - 15 = -2
  • 11 - 13 = -2
  • 9 - 11 = -2

So, this is an AP.

  • 4, 7, 10, 14, ......
  • Here, the common difference is not same in all the cases:
  • 7- 4 = 3
  • 10 - 7 = 3
  • 14 - 10 = 4

So, this is not an AP.

Hope it helps :)

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