supercat2610
Answered

Get the answers you need at Westonci.ca, where our expert community is always ready to help with accurate information. Join our platform to connect with experts ready to provide detailed answers to your questions in various areas. Explore comprehensive solutions to your questions from a wide range of professionals on our user-friendly platform.

What is the sum of the first seven terms of the geometric series where a1 = 10 and r = −2?

Sagot :

mhanifa

Answer:

  • 430

Step-by-step explanation:

Given GP with:

  • a1 = 10
  • r = -2

To find

  • S7

Solution

Formula of sum:

  • Sn = a1(r^n - 1)/(r - 1)

Substitute values:

  • S7 = 10((-2)^7 - 1)/(-2 - 1) = 10(- 128 - 1)/(-3) = 10*129/3 = 430
Thank you for trusting us with your questions. We're here to help you find accurate answers quickly and efficiently. Thanks for stopping by. We strive to provide the best answers for all your questions. See you again soon. We're dedicated to helping you find the answers you need at Westonci.ca. Don't hesitate to return for more.