Find the point on x-axis which is equidistant from the points (2, -5) and (-2, 

We know that any point on x-axis is of the form P (x, 0).
Since, P (x, 0) is equidistant from A (2, -5) and B (-2, 9)

therefore space space PA space equals space PB space equals space rightwards double arrow space PA squared equals PB squared
rightwards double arrow space left parenthesis straight x minus 2 right parenthesis squared plus left parenthesis 0 plus 5 right parenthesis squared equals left parenthesis straight x plus 2 right parenthesis squared plus left parenthesis 0 minus 9 right parenthesis squared
rightwards double arrow straight x squared minus 4 straight x plus 4 plus 25 equals straight x squared plus 4 straight x plus 4 plus 81
rightwards double arrow negative 4 straight x minus 4 straight x space equals space 81 minus 25
rightwards double arrow space minus 8 straight x space equals space 56
rightwards double arrow space straight x space equals space fraction numerator 56 over denominator negative 8 end fraction equals negative 7
Hence, the required point is (-7, 0).

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Find a point on jr-axis which is equidistant from (-5, -2) and (3, 2).

Let the required point be ‘P’ which is on the y-axis, so, its abscissa = 0 and ordinate (say) = y.
Thus co-ordinates of the point P are (0, y).
Let the given points be A(-5, -2) and B(3, 2).
It is given that: AP = BP

rightwards double arrow space square root of left parenthesis 0 minus left parenthesis negative 5 right parenthesis right parenthesis squared plus left parenthesis straight y minus left parenthesis negative 2 right parenthesis right parenthesis squared end root
equals square root of left parenthesis 0 minus 3 right parenthesis squared plus left parenthesis straight y minus 2 right parenthesis squared end root
rightwards double arrow space space square root of left parenthesis 0 plus 5 right parenthesis squared plus left parenthesis straight y plus 2 right parenthesis squared end root equals square root of left parenthesis negative 3 right parenthesis squared plus left parenthesis straight y minus 2 right parenthesis squared end root
rightwards double arrow space equals space square root of 25 plus straight y squared plus 4 plus 4 straight y end root equals square root of 9 plus straight y squared plus 4 minus 4 straight y end root
rightwards double arrow square root of straight y squared plus 4 straight y plus 29 end root equals square root of straight y squared minus 4 straight y plus 13 end root

Squaring both side, we get
y2 + 4y + 29 = y2 - 4y + 13
⇒    4y + 4y = 13 - 29
⇒    8y = -16
⇒    y = -2
Therefore, the required point is (0, -2).

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Determine by distance formula, whether the given points are collinear :
(-1, 2), (5, 0) and (2, 1).


 Let the given points be A(-1, 2), B(5, 0) and C(2, 1)then

AB space equals space square root of left parenthesis 5 minus left parenthesis negative 1 right parenthesis right parenthesis squared plus left parenthesis 0 minus 2 right parenthesis squared end root
rightwards double arrow space AB space equals space square root of left parenthesis 5 plus 1 right parenthesis squared plus left parenthesis negative 2 right parenthesis squared end root
rightwards double arrow space AB space equals space square root of left parenthesis 6 right parenthesis squared plus left parenthesis negative 2 right parenthesis squared end root
rightwards double arrow space space AB space equals space square root of 36 plus 4 end root space equals space square root of 40
rightwards double arrow space space AB space equals space square root of 4 space straight x space 10 end root equals 2 square root of 10
space space space space space space AC space equals space square root of left parenthesis 2 minus left parenthesis negative 1 right parenthesis right parenthesis squared plus left parenthesis 1 minus 2 right parenthesis squared end root
rightwards double arrow space space space AC space equals space square root of left parenthesis 2 plus 1 right parenthesis squared plus left parenthesis negative 1 right parenthesis squared end root
rightwards double arrow space space space AC space equals space square root of left parenthesis 3 right parenthesis squared plus left parenthesis negative 1 right parenthesis squared end root
rightwards double arrow space space space AC space equals space square root of 9 plus 1 end root space equals space square root of 10
and space space BC space equals space square root of left parenthesis 2 minus 5 right parenthesis squared plus left parenthesis 1 minus 0 right parenthesis squared end root
rightwards double arrow space space space BC space equals space square root of left parenthesis 3 right parenthesis squared plus left parenthesis 1 right parenthesis squared end root
Since comma space space AC space plus space BC space equals space square root of 10 plus square root of 10 equals 2 square root of 10 space equals space AB
Therefore, the points A, B and C are collinear.
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Find the relation between x and y such that point (x, y) is equidistant from the points (6, -1) and (2, 3).

Let P(x, y), A(6, -1) and B(2, 3) be the given points
It is given that :AP = BP

rightwards double arrow square root of left parenthesis straight x minus 6 right parenthesis squared plus left curly bracket straight y minus left parenthesis negative 1 right parenthesis right curly bracket squared end root
equals square root of left parenthesis straight x minus 2 right parenthesis squared plus left parenthesis straight y minus 3 right parenthesis squared end root
rightwards double arrow square root of left parenthesis straight x minus 6 right parenthesis squared plus left parenthesis straight y plus 1 right parenthesis squared end root
equals square root of left parenthesis straight x minus 2 right parenthesis squared plus left parenthesis straight y minus 3 right parenthesis squared end root
rightwards double arrow square root of straight x squared plus 36 minus 12 straight x plus straight y squared plus 1 plus 2 straight y end root
equals square root of straight x squared plus 4 minus 4 straight x plus straight y squared plus 9 minus 6 straight y end root
rightwards double arrow square root of straight x squared plus straight y squared minus 12 straight x plus 2 straight y plus 36 plus 1 end root
equals square root of straight x squared plus straight y squared minus 4 straight x minus 6 straight y plus 9 plus 4 end root

Squaring both side, we get
x2 + y2 - 12x + 2y + 36 + 1
= x2 + y2 -4x - 6y + 9 + 4
⇒ -8x + 8y + 24 = 0
⇒ -8(x - y - 3) = 0
⇒ x - y - 3 = 0 ⇒ x - y = 3.



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Show that the points A(2, -2), B(14, 10), C(11, 13) and D(-1, 1) are the vertices of a rectangle.

Given points are A(2, -2), B( 14, 10), C( 11, 13) and D(-1, 1), then


Given points are A(2, -2), B( 14, 10), C( 11, 13) and D(-1, 1), thenU
Using condition (i) and (ii), ABCD is a rectangle.
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