Question

A sequence is generated by a^n =-4(3^n)-1 what is the fifth term ?

A.-61
B. -973
C-971
D.728

Answer 1

b.) -973 is correct. hope this helps :)

Answer 2

Explanation:

I think what you meant was

an = -4(3^n) - 1

so, this is not meant to be a^n ...

and so when looking for the 5th term it just means n = 5.

a5 = -4×3⁵ - 1 = -4×243 -1 = -972 - 1 = -973

so, B is correct.