Write the following as intervals :
$\{ x:x \in R,0\, \le \,x\, < \,7\} $
$\{ x:x \in R,0\, \le \,x\, < \,7\} = \left[ {0,7} \right)$
$\{ x:x \in R,3\, \le \,x\, \le \,4\} $
Let $S=\{1,2,3, \ldots, 40)$ and let $A$ be a subset of $S$ such that no two elements in $A$ have their sum divisible by 5 . What is the maximum number of elements possible in $A$ ?
Write the solution set of the equation ${x^2} + x – 2 = 0$ in roster form.
In each of the following, determine whether the statement is true or false. If it is true, prove it. If it is false, give an example.
If $A \subset B$ and $B \subset C,$ then $A \subset C$
$\{ x:x \in R, – 12\, < \,x\, < \, – 10\} $
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