Choose correct alternatives: If h2 = ab, then slopes of lines ax2 + 2hxy + by2 = 0 are in the ratio

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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.

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