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JEE MATHEMATICS MCQ: STRAIGHT LINES

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Analyzing +4 | -1

The line

3x + 2y = 24

meets y-axis at A and x-axis at B. The perpendicular bisector of AB meets the line through (0,-1) parallel to x-axis at C. The area of the triangle ABC is

View answer and explanation

Correct option: B

91 sq. units

Option B (91 sq. units) is correct because it is the area of the triangle formed by the given line and the perpendicular bisector, calculated using determinant formula.

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If the three lines

x-3 y=p, a x+2 y=q

a x+y=r

form a right-angled triangle then :
The orthocentre of the triangle whose vertices are

\left\{ {a{t_1}{t_2},\;a\left( {{t_1} + {t_2})\} ,\{ a{t_2}{t_3},a({t_2} + {t_3}} \right)} \right\},\;\left\{ {a{t_3}{t_1},\;a\left( {{t_3} + {t_1}} \right)} \right\}

is
The distance between the parallel lines

y = 2\;x + 4

6x = 3y + 5

is The distance between the pair of lines given by

{x^2} + {y^2} + 2xy - 8ax - 8ay - 9{a^2} = 0

is Find the image of the point

(3,8)

with respect of the line

x+3 y=7

assuming the line to be plane mirror: The centroid of the triangle whose three sides are given by the combined equation

\left( {{x^2} + 7xy + 2{y^2}} \right)\left( {y - 1} \right) = 0