1.3 Formulating Abstractions with Higher-Order Procedures

1.3.4 Procedures as Returned Values

Exercises:

• 1.40 . Approximate zeros
• 1.41 . Double
• 1.42 . Composition
• 1.43 . Nth repeated application of f
• 1.44 . N-fold smoothed function
• 1.45 . Computing nth roots
• 1.46 . Iterative improvement