數學與統計 大學 約3年以前

離散數學第二章 邏輯的基本原則 請問這題的b怎麼算

19. Provide the steps and reasons, as in Exercise 18, to establish the following logical equivalences. a) p V [p ^ (p V q)] p lorer v b) p va v (p^^r) A p Vavr c) [(-pv-q) → (p^q^r)] paq 20. Şimplify each of the networks shown in Fig. 3.