In an ordered field if a>b show that a²b<ab²+(a³-b³)/3
prove thaat in an ordered field.
if √2 is a positive number whose square is 2,then √2 <3/2
proposition Let a≤x≤b ∀n and Xn→X Then a≤x≤b
proof (1) claim:x≤b
(2) claim:x≥a