ex1: Determinati multimile A si B stiind ca sunt indeplinite simultan relatiile:a) A U B ={1,2,3,4,5,6,7,8,9}; b) B \ A = {4,5,6,7,8}; d)A n B = {1}c) {3,9} n B = multimea vidad)A n B = {1}
ex2: Daca card(A) =36, card(B) =52 si card(A U B)= 74, aflati card (A n B).
ex3: Determinati multimile M si N stiind ca sunt indeplinite simultan conditiile:a) M U N = {1,2,3,4,5,6,7,8,9} b) M n N = {4,6,9} c) M U {3,4,5} = {1,3,4,5,6,8,9}d) N U {2,4,8} = {2,3,5,6,7,8,9}
!!! Acel "U" si acel "n" inseamna: U= intersectat !!!
n= reunit
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