If x-1 x-154- then x-1 x-a 4b 174c 134d 14

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Expansion of (x^2 - y^2)

If x-1 x=154,...

Question

If $x - \frac{1}{x} = \frac{15}{4}$ , then $x + \frac{1}{x}$ =

(a) 4

(b) $\frac{17}{4}$

(c) $\frac{13}{4}$

(d) $\frac{1}{4}$

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Solution

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Similar questions

Factorise $x^{2} - 3 x + 2$ by using the Factor Theorem.

{tan}^{- 1} (x + \frac{2}{x})

-

{tan}^{- 1} (x - \frac{2}{x})

= {tan}^{- 1} (\frac{4}{x})

x =

t a n^{- 1} (x + \frac{2}{x}) - t a n^{- 1} (x - \frac{2}{x}) = t a n^{- 1} \frac{4}{x}

2 x^{4} - 3 x^{2}

t a n^{- 1} (x + \frac{2}{x}) - t a n^{- 1} (x - \frac{2}{x}) = t a n^{- 1} \frac{4}{x}

250 x^{4} + 320 x^{2} + 137

x^{3} - \frac{1}{x^{3}} = 14

x - \frac{1}{x} =

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