Question

Arătați ca A ⊂ B, unde:

Rapid pls 30 de puncte ​

Answer 1

Explicație pas cu pas:

b) A = {2, 3, 6, 9}

B = {1, 2, 3, 6, 9, 18, 27, 54}

=> A ⊂ B

c) 2⁰ = 1, 2¹ = 2, 2² = 4, 2³ = 8

A = {1, 2, 4, 8}

B = {1, 2, 4, 8}

=> A ⊂ B

d) |x + 3| < 5 <=> -5 < x + 3 < 5

-5 - 3 < x < 5 - 3

-8 < x < 2

A = {-7, -6, -5, -4, -3, -2, -1, 0, 1}

|x| ≤ 7 <=> -7 ≤ x ≤ 7

B = {-7, -6, -5, -4, -3, -2, -1, 0, 1, 2, 3, 4, 5, 6, 7}

=> A ⊂ B