Question

please help me to solve maths question

Answer 1

here is your answer I think it is correct

Answer 2

Let (1/2-√5) be a rational number and of the form a/b where b ≠ 0

Then, 

1/2-√5 = a/b

     b/a = 2-√5

2 - b/a = √5

2a-b/a = √5

Here 2a-b/a is rational but however √5 is irrational and so this is a contrary.

Hence our assumption is wrong.

Hence 1/2-√5 is an irrational number.


Hence Proved.

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