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A point moves so that the sum of squares...

A point moves so that the sum of squares of its distances from the points (1, 2) and `(-2,1)` is always 6. Then its locus is

A

the straight line `y-(3)/(2)=-3(x+(1)/(2))`

B

a circle with centre `(-(1)/(2), (3)/(2))` and radius `(1)/(sqrt(2))`

C

a parabola with focus (1, 2) and directrix passing through `(-2,1)`

D

an ellipse with foci (1, 2) and `(-2,1)`

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WB JEE PREVIOUS YEAR PAPER-QUESTION PAPER 2013-MULTIPLE CHOICE QUESTIONS
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  12. Let I=((1,0,0),(0,1,0),(0,0,1)) and P=((1,0,0),(0,-1,0),(0,0,-2)). The...

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  13. If alpha, beta are the roots of the quadratic x^(2)+ax+b=0, (b ne 0), ...

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  14. The value of 1000[(1)/(1xx2)+(1)/(2xx3)+(1)/(3xx4)+……+(1)/(999xx1000)]...

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  15. The value of the determinant |(1+a^(2)-b^(2),2ab,-2b),(2ab,1-a^(2)+b^...

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  16. If the distance between the foci of an ellipse is equal to length of t...

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  17. For the curve x^(2)+4xy+8y^(2)=64 the tangents are parallel to the x-a...

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  18. The value of I=int(0)^((pi)/(4))(tan^(n+1)x)dx+(1)/(2)int(0)^((pi)/(2)...

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  19. Let f(theta)=(1+sin^(2)theta)(2-sin^(2)theta). Then for all values of ...

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  20. Let f(x)={{:(x^(3)-3x+2", "xlt2),(x^(3)-6x^(2)+9x+2", " x ...

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