Question

A sequence is defined recursively by the formula f(n + 1) = –2f(n). The first term of the sequence is –1.5. What is the next term in the sequence?

A.-3.5
B.-3
C.0.5
D.3

Answer 1

The answer is .05

Explanation:

.5+1=1.5) -2x.5=-3

-3-1.5= -1.5

Answer 2

We have f(1) = -1.5;
f(2) = -2f(1), because we put n=1 in formula f(n+1)=-2f(n);