Which expression represents the number of sides in the polygon for the nth member of the pattern? A) n + 3 B) n3 C) n + 2 D) 3n

1st member has 3 sides, (3x1)

2nd member has 6 sides (3x2)

3rd member has 9 sides' (3x3)

Therefore, i think for nth member

the appropriate expression for n th member will be 3n