Use the result in Exercise 40(b) to prove each of the following inequalities. Assume tha...

Use the result in Exercise 40(b) to prove each of the following inequalities. Assume that p, q, r, and s all are nonnegative.

Reference

(b) Prove that for all nonnegative numbers a and b we have

Hint: Use the following property of inequalities:

If x and y are nonnegative, then the inequality is equivalent to