Find the locus of a point from which three mutually perpendicular lines can be drawn to intersect the central conic ax^2+by^2=1,z=0
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If there are three or more fractions having the same numerator, they may be arranged in ascending (increasing) and descending (decreasing) order. The order will be in opposite order of denominators. The bigger denominator will make the smaller fraction.
(a) Ascending order: 1/9, 1/7, 1/5, 1/4, 1/3
as 9 > 7 > 5 > 4 > 3
(b) Descending order: 5/3, 5/6, 5/9, 5/12, 5/18
as 3 < 6 < 9 < 12 < 18
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