Question

If a= root2+1 find a-1/a

Answer 1

Step-by-step explanation:

...........................

.

Answer 2

Step-by-step explanation:

a = √2+1

find = a-1\a

√2+1 - 1/√2+1

(√2+1)(√2+1)/√2+1 - 1/√2+1

2+√2+√2+1-1/√2+1

2+2√2/√2+1

(2+2√2)(√2-1) / (√2+1)(√2-1)

(2√2-2+4-2√2) / (√2)^2 - (1)^2

2/2-1

2/1

Answer :- 2