Which of the following are A.P's? If they form an AP, find the common difference d.

 (1)          4, 0, -4, -8, -12, ...  

(2)          -2, 0, 2, 5, 8, 10, ...  

Asked by Topperlearning User | 21st Sep, 2017, 02:32: PM

Expert Answer:

           

            The common differenceis the same every time.

So, the given list of numbers form an AP with the common difference .

 

(ii)              -2, 0, 2, 5, 8, 10, ...  

                      

Here we see that  is not same every time.

Either it is 2 or 3. So, the given list of numbers do not form an AP.

Answered by  | 21st Sep, 2017, 04:32: PM