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The focal distance of the point (4,2) on...

The focal distance of the point (4,2) on the parabola `x^(2)=8y` is

A

`sqrt2`

B

`2sqrt2`

C

`3sqrt2`

D

`4sqrt2`

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The correct Answer is:
B
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DIPTI PUBLICATION ( AP EAMET)-APPLICATIONS OF DIFFERENTIATION-EXERCISE 1E (MAXIMA AND MINIMA)
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  2. The function f(x) = a sin x +1/3 sin 3x has maximum value at x=pi/3. T...

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  3. The focal distance of the point (4,2) on the parabola x^(2)=8y is

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  4. The equation of the normal to the curve x^2=4y at (2,1) is

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  5. The point on the curve y=x^2 which is nearest to (3,0) is

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  6. The point on the curve x^2=2y which is closest to the point (0,5) is

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  7. The minimum distance from the origin to a point on the curve x^(2//3) ...

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  8. The shortest distance from (-6,0) to x^2-y^2+16=0 is

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  9. The points on y=x^2+7x+2 which is closest to the line y=3x-3 is

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  10. The point on the curve y=x^2+4x+3 which is closest to the line y=3x+2 ...

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  11. The shortest distance between the line y-x =1 and the curve x=y^2 is

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  12. The longest distance of the point (a,0) from the curve 2x^2+y^2=2x is

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  13. Point P is (-2,-3) and point Q is (3,7) . The point A on the axis for ...

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  14. A line is drawn through the point (1,2) to meet the coordinate axes at...

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  15. If the perimeter of a maximum rectangle is constant , then that rectan...

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  16. The maximum area of the rectangle that can be inscribed in a circle of...

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  17. The triangle of maximum area that can be inscribed in a circle is

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  18. The maximum area of the rectangle that can be inscribed in a circle of...

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  19. The sides of the greatest rectangle that can be inscribed in (x^2)/(a...

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  20. Area of the largest rectangle that can be inscribed in the ellipse (x^...

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