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![[Post New]](/templates/default/images/icon_minipost_new.gif) 6 Sep 2007 14:45:31 IST
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two points A and B with coordinates (5,3)and(3,-2) are given.
A point P moves so that the area of  PAB is constant and equal to 9 sq.units.
find the equation of locus of P.
guys i don't want u to solve it for me. but i only want to know about the formula (related to the triangle) ..... so that i can solve it myself.
please make it fast.....
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6 Sep 2007 14:51:44 IST
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I think the ans is
5x - 11y = 28
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This is just da beginning .....
Ankur |
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6 Sep 2007 14:56:30 IST
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coolank the answer is wrong.....
the correct answer is 5x-2y-37=0
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6 Sep 2007 14:57:08 IST
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by the way i asked u to give me the procedure pal
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6 Sep 2007 15:05:16 IST
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Use the formula Area of a triangle = 1/2 |x1(y2-y3)+x2(y3-y1)+x3(y1-y2)| x1,y1= (5,3) x2,y2=(3,-2) x3,y3 =(x,y)
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6 Sep 2007 15:06:59 IST
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Sorry yaar ...... Made a calculation mistake .... Solve it by determinant method .... There can be 2 answers actually ..... 5x - 2y = 1 and 5x - 2y = 37 Sorry once again ......
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This is just da beginning .....
Ankur |
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6 Sep 2007 15:08:55 IST
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thanx guys for the help...............!!!!
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6 Sep 2007 16:17:14 IST
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1 more question...
coolank
how do u get 2 answers...???
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6 Sep 2007 16:19:31 IST
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Sinjan, modulus sign gives 2 ans because |x| may mean + or - x
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God has given you one face, and you
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~William Shakespeare
You were born an original. Don't die a copy.
~John Mason |
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6 Sep 2007 16:22:39 IST
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Ya, Srujana is right .......
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Ankur |
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6 Sep 2007 16:22:46 IST
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ok fine thanx srujana
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6 Sep 2007 16:37:50 IST
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hey can someone work it out for me i am not getting the answer...!!!
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6 Sep 2007 16:42:14 IST
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It would be
(1/2) mod ( | 5 3 1 | ) = 9
| 3 -2 1 |
| x y 1 |
You'll get it .........
Could not get it more legible ........
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This is just da beginning .....
Ankur |
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6 Sep 2007 16:43:00 IST
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1/2 |5(-2-y)+3(y-3)+x(3+2)| = 9 |-10-5y+3y-9+5x| 5x-2y-19= + or -18 5x-2y=37 or 5x-2y=1
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God has given you one face, and you
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~William Shakespeare
You were born an original. Don't die a copy.
~John Mason |
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6 Sep 2007 16:45:30 IST
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