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Question

The quadrant in which the point dividing the line segment joining the points (7, –6) and (3, 4) internally in the ratio 1 : 2 is _________.

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Solution

Let P(x, y) be the point dividing the line segment joining the points (7, –6) and (3, 4) internally in the ratio 1 : 2

Section formula: if the point (x, y) divides the line segment joining the points (x1, y1) and (x2, y2) internally in the ratio m : n, then the coordinates (x, y) = mx2+nx1m+n, my2+ny1m+n

Therefore, using section formula, the coordinates of P are:

x, y=13+271+2,14+2-61+2 =3+143,4-123 =173,-83 =173,-83

Hence, the quadrant in which the point dividing the line segment joining the points (7, –6) and (3, 4) internally in the ratio 1 : 2 is IV quadrant.

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