Question

What is the 5th term in the geometric sequence described by this explicit
formula?
an = 40 • (-2)(n-1)
A. -1280
O B. -640
C. 1280
O
D. 640

Answer 1

Answer:

C.

Step-by-step explanation:

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Answer 2

Answer:

• D. 640

Step-by-step explanation:

Given GP:

• aₙ = 40 * (-2)ⁿ⁻¹

Finding the 5th term:

• a₅ = 40* (-2)⁵⁻¹ = 40 * (-2)⁴ = 40*16 = 640

Correct option is D