Question

Question number 3
The value of x is:
=*
(1) 729
(2) 27
(3) 727
(4) None of these

Answer 1

Answer:

727

Step-by-step explanation:

Answer is a 727

Answer is a 727

Answer 2

Answer

the answer to the question is 727

step- by- step explanation:

given conditions is

$x - \frac{1}{x } = 5$

then squaring both sides of the given conditions, then we get,

$(x - \frac{1}{x} ) {}^{2} = {5 }^{2} \\ or \: {x}^{2} + \frac{1}{x { }^{2} } = 25 + 2 \\ or \: {x}^{2} + \frac{1}{x {}^{2} } = 27 \\ \: again \: squaring \: both \: sides.then \: we \: get \\ ( {x}^{2} + \frac{1}{x {}^{2} } ) {}^{2} = {27 }^{2} \\ or \: {x}^4 + \frac{1}{x {}^{4} } = 729 - 2 \\ or \: {x}^{4} + \frac{1}{x {}^{4} } = 727$