Question

OR
Prove that
5 is Irrational
is Irrational number.​

Answer 1

Answer:

it is a rational no.

Step-by-step explanation:

take 1 as a denominater

Answer 2

Answer:

Correct Question :

• Prove that √5 is irrational

Solution :

Let √5 be rational

√5 = a/b. (where a and b are co prime numbers)

Squaring both side

a² = 5b² _______________ I)

From I) 5 is a factor of a

a = 5c

Squaring both sides

=> a² = 25c²

= 5b² = 25c²

= b² = 5c² _______________ II)

It means that 5 is a common factor of a and b

Therefore, √5 is irrational