\( \frac{\log x-\sqrt{x^{2}-3 x+2}}{\sqrt{x^{2}-4}} \) For Domain
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Bonus Knowledge
To find the domain of the expression \( \frac{\log x - \sqrt{x^{2} - 3x + 2}}{\sqrt{x^{2} - 4}} \), we need to ensure both the logarithm and square root expressions are defined. First, for \( \log x \) to be defined, \( x \) must be greater than 0. Next, the term \( \sqrt{x^{2} - 4} \) in the denominator requires \( x^{2} - 4 > 0 \), which leads to \( x < -2 \) or \( x > 2 \). Additionally, the square root \( \sqrt{x^{2} - 3x + 2} \) should be non-negative; thus, we need \( x^{2} - 3x + 2 \geq 0 \). Factoring gives \( (x-1)(x-2) \geq 0 \), resulting in \( x \leq 1 \) or \( x \geq 2 \). By combining these conditions, we find that the valid domain is \( (2, \infty) \), where all required conditions are satisfied. So, the domain of the given expression is \( x \in (2, \infty) \).