Question

if x =((root2 + 1) / (root2-1)) then (x^3+1/x^3) =?​

Answer 1

Answer:

x=√2+1/√2-1

x=(√2+1)^2/(√2-1)(√2+1)=(√2+1) ^2 =2+2√2+1=3+2√2 hope its help you

Answer 2

Step-by-step explanation:

you'll get x=3+2root2----->EQ1

sub eq.1 in x^3+1/x^3