Question

a=2+✓3 find the value of
a+1/a

Answer 1

this attachment have the answer

Answer 2

$\huge{heya\:mate}$

$\large{a=2+root3}$

first find Value of 1/a

$\large{1/2+root3}$

$\bold{rationalise:denominator}$

$\large{1/2+root3*2-root3}$

$\large{1/2+root3*2-root3}$

$\large{2-root3/1}$

$\large{2-root3}$

: 1/a= $\huge{2-root3}$

NOW SIMPLY :

a+1/a

= $\large{2+root3+2-root3}$

=$\huge{4}$

$\huge{a+1/a=4}$