Homework 1

Due: February 16, 2004

• Do exercise 1.13, p. 18.
• Do exercise 1.5, p. 13.
• Exercise 1.x1: Write a procedure equivalent to the following, but using only a single if expression:

  (define diff
    (lambda (x y)
      (if (> x y)
          (- x y)
          (if (< x y)
              (- y x)
              0))))
  

• Do exercise 2.17, pp. 43-44.