F ( n ) = 45 ⋅ ( 4 5 ) n − 1 f(n)=45⋅(54)n−1f, left parenthesis, n, right parenthesis, equals, 45, dot, left parenthesis, start fraction, 4, divided by, 5, end fraction, right parenthesis, start superscript, n, minus, 1, end superscript Complete the recursive formula of f ( n ) f(n)f, left parenthesis, n, right parenthesis. f ( 1 ) = f(1)=f, left parenthesis, 1, right parenthesis, equals f ( n ) = f ( n − 1 ) ⋅ f(n)=f(n−1)⋅f, left parenthesis, n, right parenthesis, equals, f, left parenthesis, n, minus, 1, right parenthesis, dot