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प्रश्न
Choose the correct alternative:
If P(x, y) be any point on 16x2 + 25y2 = 400 with foci F(3, 0) then PF1 + PF2 is
पर्याय
8
6
10
12
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उत्तर
10
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संबंधित प्रश्न
The average variable cost of the monthly output of x tonnes of a firm producing a valuable metal is ₹ `1/5`x2 – 6x + 100. Show that the average variable cost curve is a parabola. Also, find the output and the average cost at the vertex of the parabola.
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Choose the correct alternative:
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The fixed straight line used in the definition of a conic section is called the:
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