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A point moves in such a manner that the ...

A point moves in such a manner that the sum of the squares of the distances from it to the points (a, 0) and (-a, 0) is `2b^(2)`. The locus of the point is

A

`x^(2)+y^(2)=b^(2)+a^(2)`

B

`x^(2)+y^(2)=b^(2)-a^(2)`

C

`x^(2)-y^(2)=b^(2)-a^(2)`

D

`x^(2)-y^(2)=b^(2)+a^(2)`

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WB JEE PREVIOUS YEAR PAPER-QUESTION PAPER 2007-MULTIPLE CHOICE QUESTIONS
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  8. The value of lim(n to oo) [(n!)/(n^(n))]^((1)/(n)) is equal to -

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  14. If x^(2)+y^(2)=1, the minimum and maximum values of x+y are

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  16. A=[(-i,0),(0,i)] then A^(T)A= (where I is 2xx2 identity matrix)

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  17. Show that ,the maximum value of ((1)/(x))^(x) is e^((1)/(e)

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  18. The value of the integeral int(-pi//7)^(pi//7)x^(3) cos^(2)x dx is

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  19. The sum of the series 1+(1)/(3.9)+(1)/(5.81)+(1)/(7.729)+……. to oo is

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