Question

Write $A=\{x|x\in I,x\notin W\}$ in the roster form.

• A. $A=\{...,-3,-2,-1\}$
• B. $A=\{...,3,2,1\}$
• C. $A=\{...,3,2,1,0\}$
• D. None of these
  

Answer 1

Answer: (A)

$A=\{...,-3,-2,-1\}$

$I=\{.....,-3,-2,-1,0,1,2,3,.....\}$
$W=\{0,1,2,3,.....\}$

$\text{From the definition the set A is a collection of all integers, which are not whole numbers.}$
$\therefore A=\{-1,-2,-3,...\}$

Option $A$ is the correct answer.