Write the following sets in the set-builder form :
$\{ 1,4,9 \ldots 100\} $
Write the following sets in the set-builder form :
$\{ 1,4,9 \ldots 100\} $
$\{1,4,9 \ldots 100\}$
It can be seen that $1=1^{2}, 4=2^{2}, 9=3^{2} \ldots 100=10^{2}$
$\therefore \{ 1,4,9 \ldots 100\} = \{ x:x = {n^2},n \in N{\rm{ }}$ and $1\, \le \,n\, \le \,10\} $
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