Question

which of the following sequence are A.P.? If they are A.P. find the common difference. Example:20,15,10,5​

Answer 1

Answer:

Yes, The given sequence is in A.P.

Step-by-step explanation:

Yes, the given sequence [$20,15,10,5$ ] is in A.P. as:

Common Difference,  $d = a_{2} - a_{1} = a_{3} - a_{2} = a_{4} - a_{3}$

                                      $d = 15 - 20 = 10 - 15 = 5 - 10 =(-5)$

So, d = (-5)

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