2,9, 20

1. Determine what kind of growth this is and explain how you know?
2. Explain how you can go about finding an expression for the number of small squares in the nth term.
3. What is the expression for the term of this sequence?

*I didn't understand the last answers given to me* So, when you are writting the explanation, please mark the number for which you are writing. And for number #1, please explain.

Are you referring to this ?

https://www.jiskha.com/questions/1828343/2-9-20-1-determine-what-kind-of-growth-this-is-and-explain-how-you-know-2-explain-how

Not knowing what level of math your are studying, or what grade level this is,
I don't know how else to explain this, other than "wildly guessing" at the pattern.
Looking at 2, 9, and 20, there is no obvious pattern.

btw, give yourself a nickname other than "Help Please", that is not a name.