Let see how to build up this formula that is going to give that term of rank n
1st term =a₁ = To be calculated
1st a₁ = a₁ x r° 2nd a₂ = a₁ x r¹ 3rd a₃ = a₁ x r² 4th a₄ = a₁ x r³ 5th a₅ = a₁ x r⁴ ....................... ....................... nth : a(n) = a₁ x r⁽ⁿ-¹) Note when that the subscript of a is the same as the exponent mines 1
As per the table we have: a₀ =3 = a₁ =6 = 6 a₂ =12 so r =6+/3 =12/6 = 2
