W AutoSave Off MT1... . Saved v O lolwah bukhadour O X File Home Insert Draw Design Layout References Mailings Review View Help E LG Paste Font Paragraph Styles Editing Dictate Editor Undo Clipboard Styles Voice Editor Q-2: [4+4 marks] a) Define AAB = (A - B) U (B - A), where A, B are any two sets. Show that (AAB)AC = AA(BAC). b) Prove or disprove: i. [x] = -[x]. ii. For all positive real numbers x and y, [x - y]