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Question
Choose correct alternatives:
If h2 = ab, then slopes of lines ax2 + 2hxy + by2 = 0 are in the ratio
Options
1:2
2:1
2:3
1:1
Solution
If h2 = ab, then slopes of lines ax2 + 2hxy + by2 = 0 are in the ratio 1:1.
Hint: If h2 = ab, then lines are coincident. Therefore slopes of the lines are equal.
Notes
The answer in the textbook is incorrect.
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