Answer: Use predicates, quantifiers, logical connectives,
Chapter 1, Problem 1.4.21(choose chapter or problem)
Use predicates, quantifiers, logical connectives, and mathematical operators to express the statement that every positive integer is the sum of the squares of four integers.
Unfortunately, we don't have that question answered yet. But you can get it answered in just 5 hours by Logging in or Becoming a subscriber.
Becoming a subscriber
Or look for another answer