Question
Which of the following form an AP? Justify your answer.
0, 2, 0, 2, .....

Answer

Given form of numbers will be in A.P. If $d_1 = d_2 = d_3......$
$So, d_1= 2 - 0$
$d_1 = 2$
$d_2 = 0 - 2$
$d_2 = -2$
$\therefore\text{d}_{1}\neq\text{d}_{2}$
So, the given of numbers is not an A.P.

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