In set-builder method the null set is represented by: 1. 2. 3. x … - Vidyadip

Question

In set-builder method the null set is represented by:

$\{\}$
$\phi$
$\{\text{x : x} \not=\text{x}\}$
$\{\text{x : x} =\text{x}\}.$

✓

Answer

$\{\text{x : x}\not=\text{x}\}.$

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