Question

if a=√2+1, then find the value of a-1/a​

Answer 1

Answer:

Step-by-step explanation:

Given:

a=√2+1

the value of a-1/a​  =  √2+1 - 1  / √2+1   = √2  /  √2+1

Rationalise √2  /  √2+1

√2 /  √2 +1   x    √2 - 1 /  √2 - 1

multiply both numerator  and both denominator

2 +  √2   /   √2 - 1