Question

Which of the following sequences forms an A.P.

i) 0, 2, 0, 2,..............
ii) 11, 22, 33, 44,.................

Answer 1

$i)$

$0,2,0,2,\dots \dots$

Since, the common difference between the numbers is not constant, so it is not an $A.P.$

$ii)$

$a=11,d=11.$

Since, the common difference between the numbers is constant

Hence, given sequence is an $A.P.$