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Question

With reference to figure, see which quadrants or axes do the points L, M, N, K, G, B, R, T and D belong, and find the sum of the abscissa of all the marked points.
173550_2565f35c9a4e42dba78976f3d7c6e8ef.PNG

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Solution

Concept: for any point P(m,n), m is called abscissa and n is called ordinate.
Point Position
L(3, 2) I quadrant
M(-3, 1)II quadrant
N(-4, -2)III quadrant
K(4, 0)X-axis
G(-1, 0)X-axis
B(0, 3)Y-axis
R(2, -1)IV quadrant
T(5, -2)IV quadrant
D(0, -2)Y-axis

sum of abscissa of all points
=3+(3)+(4)+(1)+0+2+5+0=3341+2+5=2

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