Question

if a = 1-√2 find the value of (a - 1/a)3
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Answer 1

Answer:

8

Step-by-step explanation:

a = 1 - √2

1 / a = 1 / 1-√2

a = - ( 1 + √2 )

( a - 1 / a ) ^ 3

[ 1 - √2 - 【 - ( 1 + √2 ) 】 ] ^ 3

[ 1 - √2 + 1 + √2 ] ^ 3

2 ^ 3

8