Question

please answer this question briefly​

Answer 1

a.p has same difference between all term

so, a2-a = a3-a2

2k-1-k = 2k+1 -2k+1

=> k-1 = 2

=> k=3

hope it helps you.....✌✌

Answer 2

Step-by-step explanation:

if a,b,c terms are in A.P

THEN 2B=A+C

SO

2(2K-1)=2K+1+1

4K-2=2K+1+K

K=3

SO OPTION IS B)3