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For the pair of parallel straight lines represented by 9x² - 6xy + y² + 18x - 6y + 8 = 0, what is the separation between them?
- 2/√10
- 1/√10
- 4/√10
- None of these
Correct answer: 2/√10
Solution
The given equation represents a pair of parallel lines, and the separation between them can be calculated using the formula for the distance between two parallel lines derived from their general form. In this case, the correct calculation yields a separation of 2/√10.
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