Question

Which one f the following is a rational number. √2 √7 √4 √5

Answer 1

Answer:

out of these only $\sqrt\\ 4$ is rational.

Step-by-step explanation:

a rational no. will have a terminating decimal expansion.

therefore,

$\sqrt2$=1.414.....

$\sqrt7$=2.645....

$\sqrt4$=2.0

$\sqrt 5$=2.236.....

therefore only $\sqrt4$ is a rational no.

Answer 2

Here's your answer :-

IRRATIONAL NUMBER A number which can neither be expressed as a terminating decimal nor as a repeating decimal, is called an irrational number.Thus, nonterminating, nonrepeating decimals are irrational numbers.

√2, √7, √5 are irrational nos. as they are not perfect square numbers while √4 can be written as 2/1 which is a rational number