Given the sequence {an} with initial terms -2, -1, 1, 5, 13, 29, 61, which approach can help you find a simple formula for {an}? Multiple choice question. The terms are obtained from the previous terms by multiplying by the same amount. The terms differ from those of the sequence {2n} by an amount that can be expressed with a simple formula. The terms are obtained from the previous terms by adding the same amount. The terms differ from those of the sequence {n3} by an amount that can be expressed with a simple formula