The area (in square unit) of the triangle formed by x + y + 1 = 0

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 Multiple Choice QuestionsMultiple Choice Questions

151.

The point on the line 3x + 4y = 5 which is equidistant from (1, 2) and (3, 4) is

  • (7, - 4)

  • (15, - 10)

  • 17, 87

  • 0, 54


152.

The equanon of the straight line perpendicular to the straight line 3x + 2y = 0 and passing through the point of intersection of the lines x + 3y - 1 = 0 and x - 2y + 4 = 0 is

  • 2x - 3y + 1 = 0

  • 2x - 3y + 3 = 0

  • 2x - 3y + 5 = 0

  • 2x - 3y + 7 = 0


153.

The value of λ with A < 16 such that 2x2 - 10xy + 12y2 + 5x + λy - 3 = 0 represents a pair of straight lines, is

  • - 10

  • - 9

  • 10

  • 9


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154.

The area (in square unit) of the triangle formed by x + y + 1 = 0 and the pair of straight lines x2 - 3xy + 2y2 = 0 is

  • 712

  • 512

  • 112

  • 16


C.

112

Given x2 - 2xy - xy + 2y2 = 0 x - 2yx - y = 0 x = 2y, x = y        . . . iAlso, x + y + 1 = 0   . . . iiOn solving eqs. i and ii, we getA- 23, - 13, B- 12, - 12, C0, 0 Area of ABC = 12- 23- 131- 12- 121001                              = 1213 - 16 = 1216 = 112


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155.

The pairs of straight lines x2 - 3xy + 2y2 = 0 and x - 3xy + 2y2 + x - 2 = 0 form a

  • Square but not rhombus

  • rhombus

  • Parallelogram

  • Rectangle but not a square


156.

If a straight line L is perpendicular to the line 4x- 2y = 1 and forms a triangle of area 4 sq unit with the coordinate axes, then the equation of the line L is

  • 2x + 4y + 7 = 0

  • 2x - 4y + 8 = 0

  • 2x + 4y + 8 = 0

  • 4x - 2y - 8 = 0


157.

The image of the point 4, - 13 with respect to the line 5x + y + 6 = 0 is

  • (- 1, - 14)

  • (3, 4)

  • (1, 2)

  • (- 4, 13)


158.

The image of the line x + y - 2 = 0 in the y-axis is

  • x - y + 2 = 0

  • y - x + 2 = 0

  • x + y + 2 = 0

  • x + y - 2 = 0


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159.

A straight line which makes equal intercepts on positive X and Y axes and which is at a distance 1 unit from the origin intersects the straight line y = 2x + 3 + 2 at x0, y0. Then 2x0 + y0 = ?

  • 3 + 2

  • 2 - 1

  • 1

  • 0


160.

The distance between the two lines represented by 8x2 - 24xy + 18y2 - 6x + 9y - 5 = 0 is

  • 0

  • 3413

  • 613

  • 7213


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