Question

Write the following sets in roaster form 1) b ={x|x²=x,xbelongs to r}

Answer 1

b={ x: x^2=x , x belongs to R)

${x}^{2} = x \\ \: x = \sqrt{x} \\ x \: belongs \: to \: r \\ \sqrt{x } \: is \: irratinonal \: \\ therefore \: the \: given \: set \: is \: irrational$