Question

The set A and set B are defined as
$A=\{x:xisanaturalnumber\}$
B = \{-x: x is a whole number\}\)
The union of set A and set B is a set of all .

• A. Integers
• B. Rational Numbers
• C. Real Numbers
• D. Integers except 0.

Answer 1

The correct option is A Integers

$A=\left\{\text{x : x is a natural number}\right\}=\{1,2,3,4,......\}$
$B=\{-x:xisawholenumber\}=\{0,-1,-2,-3,......\}$

$AUB=\{.....-3,-2,-1,0,1,2,3,.....\}$ which is a set of all integers.