Home
Class 12
MATHS
Locus of the image of the point (2, 3)...

Locus of the image of the point (2, 3) in the line `(2x-3y""+""4)""+""k""(x-2y""+""3)""=""0,""kepsiR` , is a :
(1) straight line parallel to x-axis. (2) straight line parallel to y-axis (3) circle of radius `sqrt(2)` (4) circle of radius `sqrt(3)`

A

Straight line parallel to x-axis

B

straight line parallel to y-axis

C

circle of radius `sqrt(2)`

D

circle of radius 3

Text Solution

AI Generated Solution

The correct Answer is:
To find the locus of the image of the point (2, 3) in the line given by the equation \( (2x - 3y + 4) + k(x - 2y + 3) = 0 \), we will follow these steps: ### Step 1: Understand the given family of lines The equation can be rewritten as: \[ 2x - 3y + 4 + k(x - 2y + 3) = 0 \] This represents a family of lines parameterized by \( k \). ### Step 2: Identify the two lines We can separate the equation into two parts: 1. \( 2x - 3y + 4 = 0 \) (Line 1) 2. \( x - 2y + 3 = 0 \) (Line 2) ### Step 3: Solve for the intersection of the two lines To find the intersection point of these two lines, we can solve them simultaneously. From Line 2, we can express \( x \) in terms of \( y \): \[ x = 2y - 3 \] Now substitute this expression for \( x \) into Line 1: \[ 2(2y - 3) - 3y + 4 = 0 \] Expanding this gives: \[ 4y - 6 - 3y + 4 = 0 \] Combining like terms: \[ y - 2 = 0 \] Thus, we find: \[ y = 2 \] Now substitute \( y = 2 \) back into the expression for \( x \): \[ x = 2(2) - 3 = 4 - 3 = 1 \] So the intersection point is \( (1, 2) \). ### Step 4: Find the distance from the point (2, 3) to the intersection point (1, 2) Let \( A = (2, 3) \) and \( B = (1, 2) \). The distance \( AB \) can be calculated using the distance formula: \[ AB = \sqrt{(2 - 1)^2 + (3 - 2)^2} = \sqrt{1^2 + 1^2} = \sqrt{2} \] ### Step 5: Set up the equation for the locus of the image Let the image of point \( A \) be \( (h, k) \). The distance from \( A \) to \( B \) must equal the distance from \( B \) to the image point \( (h, k) \): \[ AB = AP \] Thus, we have: \[ \sqrt{(2 - 1)^2 + (3 - 2)^2} = \sqrt{(h - 1)^2 + (k - 2)^2} \] Squaring both sides gives: \[ 2 = (h - 1)^2 + (k - 2)^2 \] ### Step 6: Replace \( h \) and \( k \) with \( x \) and \( y \) For the locus, we replace \( h \) with \( x \) and \( k \) with \( y \): \[ (x - 1)^2 + (y - 2)^2 = 2 \] ### Conclusion: Identify the locus The equation \( (x - 1)^2 + (y - 2)^2 = 2 \) represents a circle with: - Center: \( (1, 2) \) - Radius: \( \sqrt{2} \) Thus, the locus of the image of the point \( (2, 3) \) is a circle of radius \( \sqrt{2} \). ### Final Answer: The correct option is (3) circle of radius \( \sqrt{2} \).

To find the locus of the image of the point (2, 3) in the line given by the equation \( (2x - 3y + 4) + k(x - 2y + 3) = 0 \), we will follow these steps: ### Step 1: Understand the given family of lines The equation can be rewritten as: \[ 2x - 3y + 4 + k(x - 2y + 3) = 0 \] This represents a family of lines parameterized by \( k \). ### Step 2: Identify the two lines ...
Promotional Banner

Topper's Solved these Questions

  • STRAIGHT LINES

    CENGAGE ENGLISH|Exercise ARCHIVES (JEE ADVANCED)|3 Videos
  • STRAIGHT LINES

    CENGAGE ENGLISH|Exercise ARCHIVES (NUMERICAL VALUE TYPE)|1 Videos
  • STRAIGHT LINES

    CENGAGE ENGLISH|Exercise EXERCISE (NUMERICAL VALUE TYPE)|13 Videos
  • STRAIGHT LINE

    CENGAGE ENGLISH|Exercise Multiple Correct Answers Type|8 Videos
  • THEORY OF EQUATIONS

    CENGAGE ENGLISH|Exercise JEE ADVANCED (Numerical Value Type )|1 Videos

Similar Questions

Explore conceptually related problems

Find the image of the circle x^2+y^2-2x+4y-4=0 in the line 2x-3y+5=0

If A(-1, 0), B(1, 0) and C(3, 0) are three given points, then the locus of point D satisfying the relation DA^2 + DB^2 = 2DC^2 is (A) a straight line parallel to x-axis (B) a striaght line parallel to y-axis (C) a circle (D) none of these

Find the equation of the straight line parallel to x+2y=3 and passing through the point (3, 4).

The straight line (x-3)/3=(y-2)/1=(z-1)/0 is (a)Parallel to x-axis (b)Parallel to the y-axis (c)Parallel to the z-axis (d)Perpendicular to the z-axis

The straight line (x-3)/3=(y-2)/1=(z-1)/0 is (A) Parallel to x-axis (B) Parallel to the y-axis (C) Parallel to the z-axis (D) Perpendicular to the z-axis

The straight line (x-3)/3=(y-2)/1=(z-1)/0 is (a) Parallel to x-axis (b) Parallel to the y-axis (c) Parallel to the z-axis (d) Perpendicular to the z-axis

The equation of the pair of straight lines parallel tox-axis and touching the circle x^2 + y^2 – 6x – 4y - 12 = 0, is

The locus of the point (sqrt(3h),sqrt(3k+2)) if it lies on the line x-y-1=0 is (a) straight line (b) a circle (c) a parabola (d) none of these

For the straight line sqrt(3) y-3x=3 , find the intercepts on the x-axis and y-axis.

The graph of straight line y = sqrt(3)x + 2sqrt(3) is :