5.6.25. let f: a -> b be a bijection, where a and b are subsets of r. prove that if f is strictly increasing (respectively decreasing) on a, then f-1 is strictly increasing (respec- tively decreasing) on b

The area (a) of a circle with a radius of r is given by the formula and its diameter (d) is given by d=2r. arrange the equations in the correct sequence to rewrite the formula for diameter in terms of the area of the circle.