Question

The positive real root of the equation 81 x square-1=0 is answer class 10

Answer 1

Answer:

81x

2

+kx+256=0;x=α,α

3

⟹α

4

=

81

256

⟹α=±

3

4

Now −

81

k

=α+α

3

=±

27

100

⟹k=±300