Consider the following geometric sequence - 5, 10, - 20, 40, ... if the recursive formula for the sequence above expressed in the form a (n) = b*c^n-1, determine the value of b and c.

Question

Mathematics

Deborah

22 August, 02:49

Consider the following geometric sequence - 5, 10, - 20, 40, ... if the recursive formula for the sequence above expressed in the form a (n) = b*c^n-1, determine the value of b and c.

+4

Answers (1)

Know the Answer?

Kate Conway · Answer 1

B is - 5 and C is - 2. Since - 5 is the first number, a (1) is bc^0 and that would make c = 1. B would need to be - 5. In the second number, since we know b is - 5, c would need to be - 2 and anything to the 2-1 is just the same value.