JEE MATHEMATICS MCQ: STRAIGHT LINES

1 Easy

1 of 1

Application +4 | -1

If the image of a point

P(2,3)

in the line mirror

y=x

is the point

Q

and the image

Q

in the line mirror

y=0

is the point

R(x, y)

, then the coordinates of

R

are

View answer and explanation

Correct option: D

(3,-2)

Option D is correct. The image of P(2,3) in y=x is Q(3,2), and the image of Q(3,2) in y=0 is R(3,-2).

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\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\}

y = 2\;x + 4

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

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