The problem seems to involve analysis of a function $f(x) = -x - \frac{4}{x}$. It asks about limits of the function, properties related to the derivative $f'(x)$, and related analysis. The image is difficult to read, but I will attempt to answer the questions based on the discernible parts. The available choices are labeled with (C) and (D).

AnalysisFunction AnalysisDerivativesLimitsDomainInequalities
2025/5/13

1. Problem Description

The problem seems to involve analysis of a function f(x)=x4xf(x) = -x - \frac{4}{x}. It asks about limits of the function, properties related to the derivative f(x)f'(x), and related analysis. The image is difficult to read, but I will attempt to answer the questions based on the discernible parts. The available choices are labeled with (C) and (D).

2. Solution Steps

Without clear, translated questions, I will solve for the first derivative of f(x)f(x) and analyze its properties.
f(x)=x4x=x4x1f(x) = -x - \frac{4}{x} = -x - 4x^{-1}
f(x)=14(1)x2=1+4x2=1+4x2=4x2x2f'(x) = -1 - 4(-1)x^{-2} = -1 + 4x^{-2} = -1 + \frac{4}{x^2} = \frac{4 - x^2}{x^2}
To find where f(x)<0f'(x) < 0, we analyze 4x2x2<0\frac{4-x^2}{x^2} < 0. Since x2>0x^2 > 0 for all x0x \neq 0, we only need to consider 4x2<04 - x^2 < 0, which means x2>4x^2 > 4. Thus, x>2x > 2 or x<2x < -2.
The condition x2+4ln(x)>0x^2 + 4\ln(x) > 0 combined with x>0x > 0 suggests domain analysis.

3. Final Answer

Due to the image quality and the unreadable language I can't confidently answer the questions related to choosing between the options (C) and (D) or (L) and (H). However, I found f(x)=4x2x2f'(x) = \frac{4-x^2}{x^2} and f(x)<0f'(x) < 0 when x>2x > 2 or x<2x < -2.

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