Akelia, in a playful mood, asked johnny: "what would happen if we change the ‘+’ sign in your formula to a ‘−’
sign? to a ‘×’ sign? to a ‘÷’ sign? "
a. what sequence does a(n + 1) = a(n) − 3 for n ≥ 1 and a(1) = 5 generate?
b. what sequence does a(n + 1) = a(n) ⋅ 3 for n ≥ 1 and a(1) = 5 generate?