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Mathematics

The coordinates of the point on x-axis which divides the line segment joining the points (2, 3) and (5, -6) in the ratio 1 : 2 are :

  1. (2, 0)

  2. (-2, 0)

  3. (3, 0)

  4. (-3, 0)

Section Formula

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Answer

Let point P be (x, y).

The coordinates of the point on x-axis which divides the line segment joining the points (2, 3) and (5, -6) in the ratio 1 : 2 are : Reflection, RSA Mathematics Solutions ICSE Class 10.

Given,

m1 : m2 = 1 : 2

By section-formula,

(x, y) = (m1x2+m2x1m1+m2,m1y2+m2y1m1+m2)\Big(\dfrac{m1x2 + m2x1}{m1 + m2}, \dfrac{m1y2 + m2y1}{m1 + m2}\Big)

Substituting values we get :

(x,y)=(1×5+2×21+2,1×(6)+2×31+2)=(5+43,6+63)=(93,03)=(3,0).\Rightarrow (x, y) = \Big(\dfrac{1 \times 5 + 2 \times 2}{1 + 2}, \dfrac{1 \times (-6) + 2 \times 3}{1 + 2}\Big) \\[1em] = \Big(\dfrac{5 + 4}{3}, \dfrac{-6 + 6}{3}\Big) \\[1em] = \Big(\dfrac{9}{3}, \dfrac{0}{3}\Big) \\[1em] = (3, 0).

Hence, Option 3 is the correct option.

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