Question

ap 63 65 67.........and 3 1o 17

Answer 1

they both are a.p 1st one is an a.p having common difference 2 and another one is an ap having common difference 7 to find common difference we need to subtract last term with preceding term i.e a2 - a1 = a3 - a2 = a4 - a3 = ....... so on