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- Engineering
- If the focus of parabola always lies
If the focus of parabola always lies between the line x + y = 2 and x + y = 6, then a + b lies in interval
Option: 1
(0, 2)
Option: 2
(0, 1)
Option: 3
(0, 4)
Option: 4
(1, 4)
Answers (1)
Co-ordinates of focus will be S(a + 2, b), S lies to the opposite sides of origin w.r.t. line
x + y – 2 = 0 and same side as origin w.r.t line x + y – 6 = 0 hence, 0 < a + b < 4
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