Given data:
The given pattern is shown.
The expression for the dot pattern is,
[tex]a_n=n^2+1_{}[/tex]
For step 10 subtitute 10 for n in the above expression.
[tex]\begin{gathered} a_{10}=10^2+1 \\ =101 \end{gathered}[/tex]
Thus, the numbers of dots in step 10 are 101.
