Maxim and Salma were asked to find an explicit formula for the sequence 54,63,72,81,...54,63,72,81,...54, comma, 63, comma, 72, comma, 81, comma, point, point, point
Maxim said the formula is f(n)=54+9nf(n)=54+9nf, left parenthesis, n, right parenthesis, equals, 54, plus, 9, n.
Salma said the formula is f(n)=9+54nf(n)=9+54nf, left parenthesis, n, right parenthesis, equals, 9, plus, 54, n.
Which one of them is right?