Question

which of the following is not an irrational number
$\sqrt{2}$
b)
$\sqrt{7}$
c)
$\sqrt{9}$
d)
$\sqrt{3}$
​

Answer 1

hey mate

$\sqrt{9}$

this is not an irrational no. as it is the square of 3

mark as brainliest plz ❤️

Answer 2

ANSWER:

• √9 is not an irrational number.

TO FIND:

• Which is NOT an irrational number.

SOLUTION:

• √2 = 1.41421356................
• It is an irrational number because it has non terminating non repeating decimal expansion.

• √7 = 2.64575131...............
• It is an irrational number because it has non terminating non repeating decimal expansion.

• √9 = 3
• It is a rational number because it has terminating decimal expansion.

• √3 = 1.73205081...................
• It is an irrational number because it has non terminating non repeating decimal expansion.

NOTE:

• A number which have terminating or repeating decimal expansion is called a rational number.

• A number which have Non terminating or non repeating decimal expansion is called an irrational number.

• √p is an irrational number where p is a prime number.

• Collection of rational and irrational number is called real number.