Find the Values of X for Which the Expression Equals $$\sqrt { 4 - x ^ { 2 } } - x \left( \frac { 1 } { 2 } \right) \frac { 1 } { \sqrt { 4 - x ^ { 2 } } } ( 2 x )$$

question 5

Multiple Choice

Find the values of x for which the expression equals zero.
- $$\sqrt { 4 - x ^ { 2 } } - x \left( \frac { 1 } { 2 } \right) \frac { 1 } { \sqrt { 4 - x ^ { 2 } } } ( 2 x )$$

• A) \(\{ \pm \sqrt { 2 } \}\)
• B) \(\{ \sqrt { 2 } , 2 \}\)
• C) \(\{ \pm 2 \}\)
• D) \(\{ \pm \sqrt { 2 } , \pm 2 \}\)

Understand the concept of validity in test development and its various types (e.g., criterion-related, construct, content validity).

Comprehend the principle and application of reliability in test creation, including different methods to assess reliability.

Grasp the significance and methods of ensuring reduced correlation among subtests to ensure a test's construct integrity.

Discern the importance of predicting future performance through tests and the role of statistical analysis in validating tests.

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