Practicing Success
If $x - 3=\frac{1}{2x},$ then what is the value of $(x^4 +\frac{1}{16x^4})$ ? |
11 10 $99\frac{1}{2}$ 98 |
$99\frac{1}{2}$ |
We know that, If $K+\frac{1}{K}=n$ then, $K^2+\frac{1}{K^2}$ = n2 – 2 × k × \(\frac{1}{k}\) If $x - 3=\frac{1}{2x},$ then what is the value of $(x^4 +\frac{1}{16x^4})$ = ? If $x - 3=\frac{1}{2x},$ then, If $x - \frac{1}{2x} =3$ so, $x^2 + \frac{1}{4x^2}$ = 32 + 2 × 1 × \(\frac{1}{2}\) = 10 then, $(x^4 +\frac{1}{16x^4})$ = 102 - 2 × 1 × \(\frac{1}{4}\) = $99\frac{1}{2}$ |