The first three patterns of a sequence of dots is shown below.

If the pattern continues indefinitely, which of the following expressions can be used to determine the number of dots in the nth term of the sequence?

3n
n(n + 3)
n(n + 1)
n2 + 3

Question

The first three patterns of a sequence of dots is shown below.




If the pattern continues indefinitely, which of the following expressions can be used to determine the number of dots in the nth term of the sequence? 
 

  3n 
  n(n + 3) 
  n(n + 1) 
  n2 + 3

anonymous · Answer

attachment

anonymous · Answer

I'm not good at this :( sorry you can ask @FoolForMath he's good :)

anonymous · Answer

+3 just plug it in to the arithmetic formula

shayaan_mustafa · Answer

@selenamalter 
its $$n ^{2}+3$$

anonymous · Answer

got it, thanks

shayaan_mustafa · Answer

welcome