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DuE=(-∞,9>
D\E=(-∞,5)
E\D= (5,9>
D=(-∞,5) , E=<5,9> oraz wyznacz zbiory:
DnE, DuE, D\E, E\D
DnE=zbior pusty
DuE=(-∞,9>
D\E=(-∞,5)
E\D= <5,9>