Divya depos

P = 1000

R = 10% per annum

1^st year compound interest,

For 2^nd year compound interest,

For 3^rd year compound interest,

For 1^st year, 2^nd year and 3^rd year

1100, 1210 and 1331

If any sequence are in A.P. then common difference between any two consecutive term is constant

So, 1210 – 1100 = 110

1331 – 1210 = 121

So it is not constant so it is not in A.P.