Question

Find the first six terms of the sequence.

a1 = -7, an = 4 ´ an-1

-7, -28, -112, -448, -1792, -7168

-28, -112, -448, -1792, -7168, -28,672

-7, -28, -24, -20, -16, -12

0, 4, -28, -24, -20, -16

Answer 1

The correct answer is choice A

Explanation:

So I basically blindly followed the guy above, w/o even reading the question on the test, and ended up getting it wrong. If I would have actually read the question, I would have gotten it right. The question tells u to find the first 6 terms. It GIVES YOU THE FIRST TERM, -7. We now narrowed it down to either A or C. If u plug in n=2, we get -28. if u plug in n=3, we get -112. This brings us to choice A, and I was so stupid for blindly following that jhit above who gave the wrong answer and cost me 7 points on the test...

Answer 2

a1 = -7, an = 4(an - 1)
a2 = 4a1 = 4(-7) = -28
a3 = 4a2 = 4(-28) = -112

Therefore, the first six terms are -28, -112, -448, -1792, -7168, -28,672