Question

Which of the following is irrational?
a)
V9
1
5
c) 15
d) V81​

Answer 1

Answer:

√5 and √15 are irrational number

Answer 2

Answer:

hello mate!

Step-by-step explanation:

the answer, is underoot of 5,

$\sqrt{5}$

because, the first question states as,

$\sqrt{9} = 3$

and 3 can be written as 3/1 hence, it is rational

than,

$15$

is an integer like 3, hence it can be written as 15/1, it is a rational number.

$\sqrt{81}$

underroot of 81 is 9, it is also an integer(positive integer or natural number) hence, it can be written as 9/1

hence, it is also a rational nunber

so we could conclude that, underroot of 5,

is irrational because, we couldn't define how many numbers are there after the decimal point, it is exactly like

$\pi$

hence,

option b

$\sqrt{5}$

thank you mate!

have a great day ahead!