Question

1. Let A= (X:X is a perfect square, XEN 10<X<20) in roster form​

Answer 1

$\sf\large\underline\red{Given:-}$

A = {x:x is a perfect square, x € ℕ and 10<x<20}

$\sf\large\underline\red{The \: above \: can \: be \: represented \: in \: roster \: form \: in \: the \: following \: way:-}$

= { 11, 12, 13, 14, 15, 16, 17, 18, 19}