Exercise. Which of the following sequences are geometric sequences for n = 1, 2, 3, ...? an = -3n+ 5 an = - an = an = -5.714 an 5" 22+1 (3) -an-1 4nn-14 n+2 where a1 10 = an = n cos(2n) + 4 . an = n.2n ? Check work Reveal Hint