Question

Find if a =1-root2 ,find(a-1/a)3

Answer 1

here is your ans.......

Answer 2

Hi there

Your answer is :-

a = 1 - √2 ( Given )

If 3 is power then ,



( 1 - √2 - 1 / 1 - √2 ) ^3

( - √2 / 1 - √2 ) ^3

( √2 × ( 1 + √2 ))^3

( √2 + 2 )^3

2√2 + 12 + 12√2 + 8

14√2 + 20 ( Ans )





If 3 is multiplied then :-

( 1 - √2 - 1 / 1 - √2 ) 3

( - √2 / 1 - √2 ) 3

- 3√2 / 1 - √2

- ( - 3√2 × ( 1 + √ 2 ))

- ( - 3√2 - 6 )

3√2 + 6 ( Ans )

Thank You