Question

Describe the following set in Roster form:

(ii) $\{x\in N:x^2<25\}$

Answer 1

$x\in N$ that implies $x$ is a natural number.

$\because x^2<25$

$\Rightarrow -5<x<5$

As $x$ belongs to the natural number that means $0<x<5$.

All natural numbers less than 5 are 1, 2, 3, 4.

$\therefore$ Roster form will be $\{1,2,3,4\}$.