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If [tex][tex]$x=3+2 \sqrt{2}$[/tex][/tex], find the value of [tex]\left(\sqrt{x}-\frac{1}{\sqrt{x}}\right)[/tex].

Sagot :

To find the value of the expression [tex]\(\left(\sqrt{x} - \frac{1}{\sqrt{x}}\right)\)[/tex] given [tex]\(x = 3 + 2\sqrt{2}\)[/tex], follow these detailed steps:

1. Substitute the value of [tex]\(x\)[/tex]:
Given [tex]\(x = 3 + 2\sqrt{2}\)[/tex].

2. Calculate the square root of [tex]\(x\)[/tex]:
[tex]\[ \sqrt{x} = \sqrt{3 + 2\sqrt{2}} \approx 2.414213562373095 \][/tex]

3. Find the reciprocal of the square root of [tex]\(x\)[/tex]:
[tex]\[ \frac{1}{\sqrt{x}} \approx \frac{1}{2.414213562373095} = 0.4142135623730951 \][/tex]

4. Determine the desired expression:
[tex]\[ \left(\sqrt{x} - \frac{1}{\sqrt{x}}\right) = 2.414213562373095 - 0.4142135623730951 = 1.9999999999999998 \][/tex]

Therefore, the value of [tex]\(\left(\sqrt{x} - \frac{1}{\sqrt{x}}\right)\)[/tex] is approximately [tex]\(2\)[/tex].
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