Question

A={x € N| x € M5,x<32}

B={x € N| x € M7, 3<x +2< 54}

Va rog mult de tot,ajutati mă,dau coroana și follow,dar va rog,rezolvați o corect!​

Answer 1

Răspuns:

• A = {0, 5, 10, 15, 20, 25, 30}
• B = {7, 14, 21, 28, 35, 42, 49}

Explicație pas cu pas:

（*＾-＾*）Salutare!

A = {x ∈ NI | x ∈ M₅, x < 32}

B = {x ∈ NI | x ∈ M₇, 3 < x + 2 < 54}

x < 32    

dar x ∈ M₅  ⇒ x ∈ {0, 5, 10, 15, 20, 25, 30}

A = {0, 5, 10, 15, 20, 25, 30}

3 < x + 2 < 54  |-2

3 -2 < x + 2 - 2 < 54 - 2

1 < x < 52 ⇒ x ∈ {1, 2, 3, ......50, 51}

dar x ∈ M₇ ⇒ x ∈ {7, 14, 21, 28, 35, 42, 49}

B = {7, 14, 21, 28, 35, 42, 49}

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