Question

(i) fx-(1/x)=8, find x^ 3 -(1/x^ 3 ).​

Answer 1

Answer:

1) Given, x - 1/x = 8

Use / ((x - 1/x) ^ 2) = x ^ 2 + 1/(x ^ 2) - 2

(8)^ 2 =x^ 2 + 1 x^ 2 -2

Rightarrow64+2=x + 1

Rightarrow x^ 2 + 1 x^ 2 =66

Step-by-step explanation:

2) Hence, the answer is 36