Answer:
A. [tex]\sqrt{1}[/tex]
Step-by-step explanation:
We have been given four numbers. We are asked to choose the rational number.
We know that a number is rational, if we can write it as a fraction.
A. [tex]\sqrt{1}[/tex]
[tex]\sqrt{1^2}=1[/tex]
Therefore, [tex]\sqrt{1}[/tex] is a rational number.
B. [tex]\sqrt{2}[/tex]
[tex]\sqrt{2}=1.414213562373095[/tex]
Since [tex]\sqrt{2}[/tex] has non terminating decimals, therefore, it is an irrational number.
C. [tex]\sqrt{3}[/tex]
[tex]\sqrt{3}=1.7320508075688773[/tex]
Since [tex]\sqrt{3}[/tex] has non terminating decimals, therefore, it is an irrational number.
D. [tex]\sqrt{5}[/tex]
[tex]\sqrt{5}=2.2360679774997897[/tex]
Since [tex]\sqrt{5}[/tex] has non terminating decimals, therefore, it is an irrational number.
