Question

which of the following is not an AP?(A)-1.2,0.8,2.8,....(B)3,3+√2,3+2√2,.....(C)4/3,7/3,9/3,12/3(D)-1/5,+2/5,-3/5​

Answer 1

Answer:

(A) -1.2,0.8.2.8...... is not an AP.

Answer 2

Answer:

 (C)  is not 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