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for 3-
let 2a and 2b be the length of the major and minor axes. If the ellipse slides betwn two perpendicular lines, the point of intersection P of these lines being the point of intersection of perpendicular tangents lies on the Director circle of the ellipse. This means that the centre of the ellips is always at a const distance rt(a^2+b^2) frm P. Hence locus of center is a director circle.
thus, ans is B

the value of integration (dx/(a2+x2)7) between d limits 0 and infinity is equal to____???

If (G,*) is a group and the order of an element a (belongs to) G is 10, then the order of the inverse of a*a is____________????

options are- 10, 1/10, 5, 1/5

plz explain in detail

sum1 plz rply.........

does nybody know wat is 'poisson ratio'? explain..........

the number of positive integral solutions of the equation x1x2x3x4x5=1050 is_______???

plz giv detailed soln

is it better 2 get into ny normal cet college than 2 get into vit??? y?? isnt d education gud at vit??

thnx evry1 fer d info.......

but how much wz it in 2007?? cumon guys...plz sum1tell me...

no........ull need atleast more than 200 in order 2 alteast get into d waitin list............srry man..........

hey dude, i jst wanted 2 know!! is it of ny harm??? aur 27th ko kya hai?? may i plz know???

hey, doesnt ny1 know???

can u guys tell me wat was d cut of for last years jee paper? n wat do u guys expect dis year.....wat may b d cut-off??

mathz paper 2 was damn tuff................

ya, d ans is right..........how? y not d first or second???