Two marks exercise problems III — task. Mathematics State Board, Class 9.

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Represent the following sets in Roster form.

(i)

$A =$ The set of all even natural numbers less than

$20$ .

$A =$

$\{i, i, i, i, i, i, i, i, i\}$

(ii)

$B = \left\{y:y = \frac{1}{2n}, n \in \mathbb{N}, n \le 5 \right\}$

$B =$

$\{\frac{i}{i}, \frac{i}{i}, \frac{i}{i}, \frac{i}{i}, \frac{i}{i}\}$

(iii)

$C = \{x:x$ is perfect cube

$27 < x < 216\}$

$C =$

$\{i, i\}$

(iv)

$D = \{x : x \in \mathbb{Z}, -5 < x \le 2\}$

$D =$

$\{i, i, i, i, i, i, i\}$

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5. Two marks exercise problems III