What is the first term and common ratio for this geometric sequence?
Find the first term and common ratio for the geometric sequence when #a_"2"# = -15 and #a_"4"# = -375. I got r=-5, but couldn't seem to get the right value for a1. Can anyone help with this?
Find the first term and common ratio for the geometric sequence when
1 Answer
Explanation:
In geometric sequence,
So, we have
[2]
To find
When
Also, you can find this using
We can check it:
You will see that if
You find the correct
When
Also, you can find this using
We can check it:
You will see that if
It is better for you to find
Hope this can help you :)