Question

a-1/a =3 .find:a+1/a​

Answer 1

Answer:

a-1/a=3

a/a-1/a=3

-a=3

a=-3

a+1/a=-3+1/-3

9+1/-3

=-10/3

Step-by-step explanation:

Answer 2

Step-by-step explanation:

a^2-1 = 3a

a^2-3a-1 = 0

a1 = (3+√13)/2

a2 = (3-√3)/2

(a-1)(a+1) = 3a

(a^2 + 1 ) / a = (2+3a)/a = 3+2/a

= 3+4/(3+√13) = (9+3√13+4)/(3+√13)

= (13+√13)/(3+√13)

= 3+4/(3-√13) = (9-3√13+4)/(3-√13)

= (13-√13)/(3-√13)