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The equation 2y? - xy - x? +6x - 8 = 0 represents
(a) A pair of straight lines (b)
A circle
One of the lines represented by the equation x2 +60 = 0) is
(c) An ellips
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Step-by-step explanation:
1. If the slope of one of lines ax2 + 2hxy + by2 = 0 is thrice that the other, then is
A:
2. If the lines ax2 + 2hxy + by2 = 0 are equally inclined with coordinate axes, then
A: h = 0, ab < 0
3. The equation of the pair of lines passing through (1, 2) and parallel to the coordinate axes is
A: xy - 2x - y + 2 = 0
4. x2 + k1y2 + 2k2y - a2 = 0 represents a pair of perpendicular lines if
A: k1 = -1; k2 = -a
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