Which of the following form an AP? Justify your answer.
$ 11,22,33, \ldots $

Given:

Given sequence is \( 11,22,33, \ldots \)

To do:

We have to check whether the given sequence is an AP. 

Solution:

In the given sequence,

$a_1=11, a_2=22, a_3=33$

$a_2-a_1=22-11=11$

$a_3-a_2=33-22=11$

Here,

$a_2 - a_1 = a_3 - a_2$

Therefore, the given sequence is an AP.

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Updated on: 10-Oct-2022

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