The universal set is $\xi=\{x\in\mathbb Z:-4\le x\le5\}$. Let $A=\{x\in\xi:x^2

Question

The universal set is $\xi=\{x\in\mathbb Z:-4\le x\le5\}$. Let $A=\{x\in\xi:x^2<10\}$. List the elements of $A$.[2] State $n(A)$ and determine whether $0\in A$.[2]

Accepted Answer

(a) $\{-3,-2,-1,0,1,2,3\}$ (b) $7$; yes

Reading a set-builder rule

Reading a set-builder rule

Solution:

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