Exercise 2.2.5: (back)

Question 1:

(define (f1 n)
  (+ (* n n) 10))
  
> (f1 2)
14

> (f1 9)
91

Question 2:

(define (f2 n)
  (+ 
   (* (/ 1 2) (* n n))
   20))

> (f2 2)
22

> (f2 9)
60 1/2

Question 3:

(define (f3 n)
  (- 2 (/ 1 n)))
  
> (f3 2)
1 1/2

> (f3 9)
1 8/9