Question

Hello again ((:

Answer 1

@AZ

Answer 2

Ah beat me

Answer 3

Been waiting

Answer 4

Goodie

Answer 5

So I can't figure out the relation between these numbers

Answer 6

So the numbers are decreasing

What does it look like?

Are we subtracting or dividing?

The fastest way to check is to just do the math

and you have to do it twice to make sure you get the same number both times

14 - 19 = ??
9 - 14 = ??

if you get the same number, that means since we subtracted, it's an arithmetic sequence and that number you get is your common difference

but if it's not the same number, we have to see if it's a geometric sequence
(we have to check regardless because sometimes it could be neither an arithmetic sequence or a geometric one)

so
14/19 = ??
9/14 = ??

if you get the same number, that would tell you it's a geometric sequence and that number you get when you divide is the common ratio

Answer 7

4 yeah

Answer 8

No shouldn't it be 5

Answer 9

No nvm

Answer 10

Who, me?

Answer 11

\(\color{#0cbb34}{\text{Originally Posted by}}\) @Allison
No shouldn't it be 5
\(\color{#0cbb34}{\text{End of Quote}}\)

well that's how much we're subtracting by, but remember how we got that last question accidentally wrong? It's important to do second term minus the first term

so

14 - 19 = ??
9 - 14 = ??

is it 5 or -5

Answer 12

-5

Answer 13

Exactly!

Because from the first term to the second term, we're changing it by -5

and then from the second term to the third term, it's the same common difference

Answer 14

Got it (:

Answer 15

Splendid :)