Question

se considera multimile a={1^2,2^2,3^2,...,2019^2} si b={1^3,2^3,3^3,...,2019^3}. determinati cardinalul multimii a reunit cu b​

Answer 1

a = {1² , 2², 3², ....2019²}

b = {1³, 2³, 3³, ....2019³} ⇒ indiferent ca au puteri multimile a si b , sirul are 2019 de numere

deci a ∩ b = card(a) ∩ card (b) = a = {1^2, 2^2, 3^2,.....2019^2}