Question

If x= 2+ √3 then x+1/x is

a) -2√3
b) 2√3
c) 4
d) -4​

Answer 1

Answer:

x = 2 + √3 1/x = 1/(2 + √3) * ( 2 - √3)/(2 - √3) 1/x = (2 - √3)/(4 - 3) [ (a - b)(a + b) = (a² - b²) ] 1/x = (2 - √3) now, x + 1/x ...