Question

If x= 7+4V3 and xy = 1, then

1/x²+1/y²=​

Answer 1

Answer:

y^2+x^2/x^2×y^2

= x^2 + y^2

= 194.(ans)

Step-by-step explanation:

let, a =7

$b \: = 4 \sqrt{3}$

(a+b)^2+ (a-b)^2

2(a^2+b^2)

2(7^2 + 4root 3 ^2 )

= 2×(49+48)

= 2×97

= 194.