Yahoo Answers is shutting down on May 4th, 2021 (Eastern Time) and the Yahoo Answers website is now in read-only mode. There will be no changes to other Yahoo properties or services, or your Yahoo account. You can find more information about the Yahoo Answers shutdown and how to download your data on this help page.
Trending News
Geometric sequence and how to write a rule for the nth term?
ok so so i have an=3( )n-1
I need to find the common ratio of 3,-2,4/3,-8/9.... and use this formula an=a1rn-1 the n-1 is like a power kinda of like 2^2 on a calculator answer would be 4
CAN YOU SOLVE THIS ONE ALEX AND HOW DO I CHOOSE BEST ANSWER ??
an=a1Rn-1 the r is the ratio i have to plug in
1 Answer
- Anonymous8 years agoFavorite Answer
The first thing to know is the common ration. The common ratio is the number you multiply each term by to get the next one. To get the common ration, divide the first term by the second term. If you want you can continue to divide the second term by the third term to check. In this case your common ration is -1.5. The answer to this is an=3(-1.5)^(n-1). You probably know this, but the n is the first term which is given and it is 3. The answer depends on n (obviously).