Question

8. Prove that (2+375) is an irrational number, given that 15 is an
irrational number.
[CBSE 2019]​

Answer 1

Answer:

377=15

LHS=RHS

Step-by-step explanation:

2+375=377

Answer 2

Step-by-step explanation:

Given Prove that (2+3√5) is an irrational number, given that √5 is an irrational number.

• Given to prove that 2 + 3√5 is an irrational number given √5 is an irrational number.
• Now let 2 + 3√5 = m
•        So 3√5 = m – 2
•        Or √5 = m – 2 / 3
• Here we can see that left hand side is irrational and right hand side is rational which is a contradiction and therefore 2 + 3√5 cannot be rational.  

So 2 + 3√5 is an irrational number.

Reference link will be

https://brainly.in/question/5018670