Class 9th math 3.1 solution english PCTB

Question 1: Write the following sets in set builder notation:

\((iii)\) \(\quad\) \(\{0, \pm 1, \pm 2, \ldots, \pm 1000\}\)

Solution:

We observe in the set \(\{0, \pm 1, \pm 2, \ldots, \pm 1000\}\), the smallest number is \(-1000\), the greatest number is \(1000\), and the numbers increase by steps of \(1\). Therefore, this set consists of integers.

Set Builder Notation:

\(\{ x \mid x\in Z \land -1000 \leq x \leq 1000 \}\)

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