Examples for finite A.P

(i) 3, 5, 7, 9, 11

where a = ; d = .

(ii) x, x + a, x + 2a, x + 3a, x + 4a, x + 5a

where a = ; d = .

Examples for infinite A.P

(i) 10, 20, 30, 40, ……

where a = , d = .

(ii) 5.5, 6.6, 7.7, 8.8, 9.9,……

where a = ; d = .

(iii) -100, -95, -90, -85,…..

where a = – , d = .