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Sticky Note
The range of x² + y² = 1 is?
  1. [-1, 1]
  2. [-1, 0]
  3. [0, 1]
  4. None of these
Explanation

Given the equation x^2 + y^2 = 1, the range of y values is [-1, 1] since y ranges from -1 to 1 as x varies.

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