1-amliy ish Mustaqil yechish uchun masalalar

^{1-amliy ish}

Mustaqil yechish uchun masalalar:

1. 
   Quyidagi to’plamlar uchun soddaroq berilish usulini yozing:
   

1. 
   А  x : x - butun son va x²  4x 12  0_;
   
2. 
   B  x : x - "r"harfi qatnashmaydigan oy nomlari_;
   
3. 
   C  n : n - butun son_.
   

2. 
   Quyidagi to’plamlar elementlarini yozing:
   

_a) А  x : x  Z, 16  x  23_;
b) B  x : x  Z, x ²  18_;
c) C  x : x  N, - 6  x  3_;

Javoblar
1.

1. 
   А  x : x - butun son va x²  4x 12  0_;
   

(x + 6)(x - 2) = 0
A={−6,2}

2. 
   B  x : x - "r"harfi qatnashmaydigan oy nomlari_; B={"may","iyun","iyul","avgust"}
   
3. 
   C  n : n - butun son
   

C={...,−3,−2,−1,0,1,2,3,...}
2.

1. 
   А  x : x  Z, 16  x  23;
   

A={16,17,18,19,20,21,22,23}

2. 
   B  x : x  Z, x ²  18_;
   

B={-4,-3,-2,-1,0,1,2,3,}

3. 
   C  x : x  N, - 6  x  3;
   

C={0,1,2,3}