Question

rezolvati ex 16 17 vrg dau coroana​

Answer 1

Explicație pas cu pas:

16.

A = {1, 2, 3, 6}

B = {1, 2, 4, 8}

A∪B = {1, 2, 3, 4, 6, 8}

A∩B = {1, 2}

A - B = {3, 6}

B - A = {4, 8}

17.

(2x + 1) ∈ {1, 2, 3, 5, 6, 10, 15, 30} |-1

2x ∈ {0, 1, 2, 4, 5, 9, 14, 29} |:2

x ∈ N => x ∈ {0, 1, 2, 7}

A = {0, 1, 2, 7}

(x - 1) ∈ {1, 2, 3, 4, 6, 12} |+1

=> x ∈ {2, 3, 4, 5, 7, 13}

B = {2, 3, 4, 5, 7, 13}

A∪B = {0, 1, 2, 3, 4, 5, 7, 13}

A∩B = {2, 7}

A - B = {0, 1}

B - A = {3, 4, 5, 13}

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