Question

If a= 1-root 2hen find the value of a - 1/a whole cube
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Answer 1

Answer:

998861

Step-by-step explanation:

Answer 2

Answer:

8

Step-by-step explanation:

a= 1- √ 2

1/a = -1-√ 2 by rationalizing

1-√ 2 - (-1-√ 2)= 1 - √ 2 + 1 +√ 2

(a-1/a)^3 =  (1 - √ 2 +1 +√ 2)^3

you can cut √ 2 as they r the same no. with opposite sign

(1+1)^3 = 2^3 = 8

hope this helps