If $ p^4 = 4354 -\frac{1}{p^4}$ then the value of $p^3 - \frac{1}{p^3}$ can be :
Answer & explanation
Correct answer: option 1
If x4 + \(\frac{1}{x^4}\) = a
then x2 + \(\frac{1}{x^2}\) = \(\sqrt {a + 2}\) = b
and x - \(\frac{1}{x}\) = \(\sqrt {b - 2}\)
If $ p^4 = 4354 -\frac{1}{p^4}$
then the value of $p^3 - \frac{1}{p^3}$ = ?
If $ p^4 = 4354 -\frac{1}{p^4}$
$ p^4 + \frac{1}{p^4}= 4354 $
p2 + \(\frac{1}{p^2}\) = \(\sqrt {4356 + 2}\) = 66
and p - \(\frac{1}{p}\) = \(\sqrt {66 - 2}\) = 8
If x - \(\frac{1}{x}\) = n
then, $x^3 -\frac{1}{x^3}$ = n3 + 3 × n
$p^3 - \frac{1}{p^3}$ = 83 + 3 × 8
$p^3 - \frac{1}{p^3}$ = 512 + 24= 536