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Did you know that the function \( f(x) = \frac{7 x^{3} + x}{6 \sqrt{x}} \) can be simplified? You can factor out common elements in the numerator to make it easier to analyze. By rewriting it as \( f(x) = \frac{x(7x^{2} + 1)}{6 \sqrt{x}} \), and simplifying further gives \( f(x) = \frac{7\sqrt{x}}{6} + \frac{1}{6\sqrt{x}} \). This makes it much clearer how the function behaves as \( x \) changes! When it comes to solving problems involving functions like this, a common mistake is not considering the domain carefully. The term \( \sqrt{x} \) means \( x \) must be non-negative. So remember, \( x \) must be greater than or equal to zero; otherwise, your function could lead you into some roots of negative numbers—yikes! Always check those domains!