Question

Identify the following as rational (R) or irrational (I)Which of the following are equivalent to x^4?

Answer 1

Start by writing the radicals as decimal numbers

`\begin{gathered} \sqrt[]{9}=3 \\ \sqrt[]{10}=3.162277\ldots \\ \sqrt[]{21}=4.582575\ldots \end{gathered}`

A rational number is one that can be written as a decimal number or a fraction without changing the corresponding value.

the only rational number is √9 since √10 and√21 cannot be writen as fractions in order to be called as a rational.