Question

Find $a_n$ for the given geometric sequence. $4, -\frac{4}{5}, \frac{4}{25}, -\frac{4}{125}, \frac{4}{625}, ...$ A. $a_n = 4\left(-\frac{1}{5}\right)^n$ B. $a_n = 4\left(-\frac{1}{5}\right)^{n-1}$ C. $a_n = 4\left(-\frac{1}{25}\right)^{n-1}$ D. $a_n = 4\left(\frac{1}{5}\right)^{n-1}$

          Find $a_n$ for the given geometric sequence.
$4, -\frac{4}{5}, \frac{4}{25}, -\frac{4}{125}, \frac{4}{625}, ...$
A. $a_n = 4\left(-\frac{1}{5}\right)^n$
B. $a_n = 4\left(-\frac{1}{5}\right)^{n-1}$
C. $a_n = 4\left(-\frac{1}{25}\right)^{n-1}$
D. $a_n = 4\left(\frac{1}{5}\right)^{n-1}$

Show more…

Find an for the given geometric sequence.
4, -(4)/(5), (4)/(25), -(4)/(125), (4)/(625), ...
A. an = 4(-(1)/(5))^n
B. an = 4(-(1)/(5))^n-1
C. an = 4(-(1)/(25))^n-1
D. an = 4((1)/(5))^n-1

Added by Katrina K.

Precalculus with Limits

Ron Larson 2nd Edition

Instant Answer

Solved by Expert Mukesh Devi

Step 1

We know that the geometric sequence has the form: $a, ar, ar^2, ar^3, \dots$ Show more…

Show all steps

lock

Thanks for your feedback!

Find a for the given geometric sequence 5 25 125 625 OA. 4=4(-3)" 0 BJ a0 =4(-3)" 4=4(-3) 4,=4(3)'

Play audio

Feedback

Powered by NumerAI

Mukesh Devi and 94 other subject Precalculus educators are ready to help you.

Ask a new question

Labs

Want to see this concept in action?

NEW

Explore this concept interactively to see how it behaves as you change inputs.

View Labs

Key Concepts

Recommended Videos

Recommended Textbooks

Ace is your personal tutor. It breaks down any question with clear steps so you can learn.

Start Using Ace

Continue solving this problem

Create a free account to:

View full step-by-step solution
Ask follow-up questions with Ace AI
Save progress and study later