Question

if x=1+√2 find the value of (x-1/x)^3​

Answer 1

Answer:

(x-1/x)³=8

Step-by-step explanation:

∵x=1+√2

∴1/x=1/(1+√2)

by rationalising factor,

1/x=1-√2

(x-1/x)³={(1+√2)-(1-√2)}³

          ={1+√2-1-√2}³

          ={1+1}³

          =(2)³

          =8

Answer 2

Answer:

The answer is in the attachment :)