Question

Select the answer that contains all of the expressions that give the number of small squares in Step n. Step 1 Step 2 Step 3 A. n²+1 B. n(n + 1) C.n²+n D, n + n + 1 A B C B.CO B.C

Answer 1

the right options are B and C

we can check b

first step

n=1

`1(1+1)=2`

right

second step

n=2

`2(2+1)=6`

Third step

n=3

`3(3+1)=12`

and c is correct because it is basically the same as b but written in a different way

`\begin{gathered} n(n+1) \\ (n* n)+(n*1) \\ n^2+n \end{gathered}`