Question

If x= 3 + 2 V2
then find the value
of (x + 1 / x)³​

Answer 1

Answer:

216

Step-by-step explanation:

$x= 3+2\sqrt{2}\\.:\frac{1}{x} = 3-2\sqrt{2} [rationalising]\\.:x+ \frac{1}{x} = 6\\\\.:(x+ \frac{1}{x} )^{3} = 6^{3} =216$