the equations of the altitude AD, BE, CF of a triangle ABC arex + y = 0, x - 4y = 0, 2x - y = 0 respectively. the cordinates of Aare (t, -t), find the cordinates of B & c.

Dillard

Dillard

Answered question

2021-02-21

the equations of the altitude AD, BE, CF of a triangle ABC arex +y=0, x4y=0, 2xy=0 respectively. the cordinates of Aare (t,t), find the cordinates of B & c. Prove tha as tvaries the locus of the centroid of the triangle ABC is theline x+5y=0

Answer & Explanation

okomgcae

okomgcae

Skilled2021-02-22Added 93 answers

Question:
the equations of the altitude AD,BE, CF of a triangle ABC are x+y=0, x4y=0, 2xy=0 respectively. the cordinates of A are (t,t), find the cordinatesof B & c. Prove tha as t varies the locus of the centroid ofthe triangle ABC is the line x+5y=0
A is (t,-t)
SINCE B LIES ON BEX4Y=0ITS COORDINATES SHOULD SATISFYEQN. OF BE....HENCE LET B BE (4b,b)slope of BE=14
similarly C is (c,2c).slope of CF=2
since BE is perpendicular to AEC......
slope of AC× slope of BE=1
{(2c+t)(ct)×(14)=1
2c+t=4(ct)=4c+4t
6c=3t
c=t2.......................hence C is (t2,t)
similarly..we get since AFB is perpendicular to CF slope of AB× slope of
CF={1{(b+t)}{(4bt)}×2=12b+2t=4b+t6b=t
b=t6 .....hence B is (2t6,t6)

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