Question

Please help guys, i’m so lost aaahhhh

Consider a geometric sequence with a first term of 4 and a fourth term of -2,916.

a. find the common ratio of this sequence.

b. find the sum to infinity of this sequence

Answer 1

Explanation:

4r³=-2916

r³=-729

r=-9

b)s=
`(4)/(1+9)`

=
`(4)/(10)`

=
`(2)/(5)`