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y=4x3xy=\sqrt{\frac{4}{x}}-\sqrt{3x}

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Q. y=4x3xy=\sqrt{\frac{4}{x}}-\sqrt{3x}
  1. Define Domain Criteria: We need to determine the set of all possible xx values for which the function y=(4x)3xy = \sqrt{\left(\frac{4}{x}\right)} - \sqrt{3x} is defined. The domain of a function is the set of all possible inputs (xx values) that will give real number outputs for the function.
  2. First Term Analysis: The first term of the function is (4x)\sqrt{\left(\frac{4}{x}\right)}. The square root function is only defined for non-negative numbers. Therefore, 4x\frac{4}{x} must be greater than or equal to 00. This implies that xx must be greater than 00 because if xx were negative, the fraction 4x\frac{4}{x} would be negative, which is not allowed under a square root.
  3. Second Term Analysis: The second term of the function is 3x-\sqrt{3x}. Similarly, the square root function here is only defined for non-negative numbers. Therefore, 3x3x must be greater than or equal to 00. This implies that xx must be greater than or equal to 00.
  4. Combine Conditions: Combining the conditions from both terms, we find that xx must be greater than 00 to satisfy the first term and greater than or equal to 00 to satisfy the second term. The common condition that satisfies both is that xx must be strictly greater than 00.
  5. Consider Exclusion: However, we must also consider that xx cannot be zero because the term 4x\frac{4}{x} would involve division by zero, which is undefined. Therefore, the domain of the function excludes x=0x = 0.
  6. Final Domain: The domain of the function y=(4x)3xy = \sqrt{\left(\frac{4}{x}\right)} - \sqrt{3x} is therefore all positive real numbers except zero. This can be expressed in set notation as \{x | x > 0\}.

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