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, where the first term should be f(1)f(1)f, left parenthesis, 1, right parenthesis. 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?
Choose 1
Choose 1

(Choice A)
A
Only Maxim

(Choice B)
B
Only Salma

(Choice C)
C
Both Maxim and Salma

(Choice D)
D
Neither Maxim nor Salma