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The number of integers satisfying the eq...

The number of integers satisfying the equation `|x|+|(4-x^(2))/(x)|=|(4)/(x)|` is

A

`5`

B

`4`

C

`6`

D

`7`

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To solve the equation \( |x| + \left| \frac{4 - x^2}{x} \right| = \left| \frac{4}{x} \right| \), we will follow these steps: ### Step 1: Analyze the expression We start with the equation: \[ |x| + \left| \frac{4 - x^2}{x} \right| = \left| \frac{4}{x} \right| \] We can rewrite the left-hand side: \[ |x| + \left| \frac{4 - x^2}{x} \right| = |x| + \left| \frac{4}{x} - x \right| \] ### Step 2: Determine the conditions for the absolute values For the absolute values to be valid, we need to consider the conditions under which the expressions inside the absolute values are non-negative or negative. 1. The term \( \frac{4 - x^2}{x} \) is defined for \( x \neq 0 \). 2. We need to ensure that \( 4 - x^2 \geq 0 \), which simplifies to: \[ x^2 \leq 4 \implies -2 \leq x \leq 2 \] ### Step 3: Identify the intervals From the above condition, we have: \[ x \in [-2, 2] \quad \text{and} \quad x \neq 0 \] Thus, the possible intervals for \( x \) are: \[ [-2, -1], [-1, 0), (0, 1], [1, 2] \] ### Step 4: Solve for each interval We will analyze the equation in the intervals \( [-2, -1] \), \( [-1, 0) \), \( (0, 1] \), and \( [1, 2] \). 1. **Interval \( [-2, -1] \)**: - Here, \( |x| = -x \) and \( |4 - x^2| = 4 - x^2 \). - The equation becomes: \[ -x + \frac{4 - x^2}{-x} = \frac{4}{-x} \] - Simplifying gives: \[ -x - \frac{4 - x^2}{x} = -\frac{4}{x} \] - This leads to: \[ -x - \frac{4}{x} + x = 0 \implies 0 = 0 \] - All values in this interval satisfy the equation. 2. **Interval \( [-1, 0) \)**: - Here, \( |x| = -x \) and \( |4 - x^2| = 4 - x^2 \). - The equation becomes: \[ -x + \frac{4 - x^2}{-x} = \frac{4}{-x} \] - This simplifies similarly to: \[ 0 = 0 \] - All values in this interval satisfy the equation. 3. **Interval \( (0, 1] \)**: - Here, \( |x| = x \) and \( |4 - x^2| = 4 - x^2 \). - The equation becomes: \[ x + \frac{4 - x^2}{x} = \frac{4}{x} \] - This simplifies to: \[ x + \frac{4}{x} - \frac{x^2}{x} = \frac{4}{x} \implies x = 0 \] - No values in this interval satisfy the equation. 4. **Interval \( [1, 2] \)**: - Here, \( |x| = x \) and \( |4 - x^2| = 4 - x^2 \). - The equation becomes: \[ x + \frac{4 - x^2}{x} = \frac{4}{x} \] - This simplifies similarly to: \[ x + \frac{4}{x} - \frac{x^2}{x} = \frac{4}{x} \implies x = 0 \] - No values in this interval satisfy the equation. ### Step 5: Count the integers The integers satisfying the equation are: - From \( [-2, -1] \): -2, -1 - From \( [-1, 0) \): None - From \( (0, 1] \): None - From \( [1, 2] \): 1, 2 Thus, the integers satisfying the equation are: - -2, -1, 1, 2 ### Final Answer The total number of integers satisfying the equation is **4**.

To solve the equation \( |x| + \left| \frac{4 - x^2}{x} \right| = \left| \frac{4}{x} \right| \), we will follow these steps: ### Step 1: Analyze the expression We start with the equation: \[ |x| + \left| \frac{4 - x^2}{x} \right| = \left| \frac{4}{x} \right| \] We can rewrite the left-hand side: ...
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