Question

if x is equal to 2 + under root 3 then find value of x+1/x​

Answer 1

x=2+√3

1/x=1/2+√3

rationalisation

=1/2+√3×2-√3/2-√3

=2-√3/4-3

1/x=2-√3

x+1/x=2+√3+2-√3

=2+2

=4