The 3rd and 4th terms of a geometric progression are 5 and 20, respectively. Find the 1st

Question:

The 3rd and 4th terms of a geometric progression are 5 and −20, respectively.
Find the 1st term, the common ratio, r, and the 9th term.

Fantastic news! We've Found the answer you've been seeking!

Step by Step Answer:

Related Book For  book-img-for-question
Question Posted: