Question

give answer with solution​

Answer 1

Answer:

83 is the answer

Step-by-step explanation:

(x-1/x)^2 +2×X×1/x

= x^2+1/x^2

=81+2

=83(ans)

Answer 2

Answer:

Given,

4x= x81

⟹ 4x 2 =81

⟹ x 2 = 481

Taking square root on both the sides we get,

x=± 29

∴ x=±4.5.