Write the first 4 terms of each sequence

Question

a1 = 3 and an = 4an-1 for n is greater than or equal to 2 

Answer 1

a₁ = 3

a₂ =4(a₁) - 1 = 12 - 1 = 11

a₃ = 4(a₂) - 1 = 44 - 1 = 43

a₄ = 4(a₃) - 1 = 172 - 1 = 171