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![[Post New]](/templates/default/images/icon_minipost_new.gif) 12 Nov 2007 20:14:15 IST
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show that the lines 3x - 4y + 5 =0. 7x - 8y + 5 = 0 and 4x + 5y = 45 are concurrent show process
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<TABLE CELLSPACING="1" CELLPADDING="1" BORDER="0">
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<DIV ALIGN="right">Glitter Graphics</DIV></TD></TR></TABLE>
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12 Nov 2007 20:25:01 IST
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find pt of intersection of any two and satisfy it in the thrid eqn.
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There is no better feeling in this world than being a winner! |
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12 Nov 2007 20:25:31 IST
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first method:::
find the pt of intersection of the any 2 lines and satisify it in third
if the third eqn is satisified then they r concurrent
second method::::
put the determinant of coefficients like this
3 -4 5
7 -8 5 = 0
4 5 -45
nudge if hav a doubt
rate if satisified.....
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Who says nothing is impossible.
I've been doing nothing for years !!..............
I know KUNG FU KARATE
and 47 other dangerous words.............
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12 Nov 2007 20:25:47 IST
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i think u shud use the dterminant formula for area of a triangle....
it comes out to be zero then lines r concurrent
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12 Nov 2007 21:06:20 IST
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Simple... the determinant of the coefficients of the equations should be zero.
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Will nip in at times to solve problems :)
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