Question

Which of the following is not an A.P. ?
(A) - 1.2, 0.8, 2.8, ...
(B) 3,3 +12,3 + 22,3 + 32, ...
4 7 9 12
3'3'3' 3''**
-1 -2 -3
5 5 5 ***​

Answer 1

Answer:

question number 20 answer of correct

Answer 2

Option 2 is not an A.P .

We know A.P is arithmetic progression i.e the difference between every consecutive terms is constant .

In Option (A) the series is :

-1.2 , 0.8 , 2.8 ,......

0.8 - (-1.2) = 2.0

2.8 - 0.8 = 2.0

Here difference between consecutive terms is constant .

Therefore , its an A.P .

In Option (B) the series is :

3 , 3+12 , 3 + 22 , 3 + 32 , ......

Here we can see the difference is not constant .

Therefore , its not an A.P .

Hence , this is the required solution .

Learn More :

Arithmetic progression

https://brainly.in/question/16056800