Question

.If a =2+√3, then (a +1/a)

Answer 1

Answer:

4

Step-by-step explanation:

a=2+√3

1/a=(2-√3)/(4-3) = 2-√3

Now a+1/a= 2+√3+2-√3= 4

Answer 2

Answer:

4

Step-by-step explanation:

a+1/a = 2+√3 + 1/(2+√3)

= 2+√3 +1/(2+√3)×(2-√3)/(2-√3)

= 2+√3 + (2-√3)/4-3

= (2+√3)+(2-√3)

=4