Question

please answer this question​

Answer 1

Answer:

this is the question in cbse 2020 maths board paper

Step-by-step explanation:

the answer was option -c

because ,

the difference b/w first two terms 3/3

the difference between next two terms was2/3

the difference is not equal at every time

so it is not an a.p

Answer 2

Answer:

All except   (C)  are in A.P.

Step-by-step explanation:

(A) -1.2,0.8,2.8,..............

     Here, a = -1.2   and    d = 2

(B) 3,3+√2,3+2√2,............

      Here, a = 3      and     d = √2

(D) a = -1/5   and  d = -1/5