# Math Help - Sequences and Summations (1)

1. ## Sequences and Summations (1)

Just want to verify my answers, if there are wrong answers then plz help me.

1) Give the first 4 terms of the following sequences
(indices begin at 0; you need not multiply everything out):

a) {An} = (-2)^n

b) {An} = 3

c) {An} = 7 + 4^n

d) {An} = 2^n + (-2)^n

a) 1,-2,4,-8
b) 3
c) 1,11,23,71
d) 2,0,8,0

2. Originally Posted by kashifzaidi
Just want to verify my answers, if there are wrong answers then plz help me.

1) Give the first 4 terms of the following sequences
(indices begin at 0; you need not multiply everything out):

a) {An} = (-2)^n

b) {An} = 3

c) {An} = 7 + 4^n

d) {An} = 2^n + (-2)^n

for c), how much is $7+4^0$? Definitely not 1! The other terms are correct though, and so are a) and d).