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Given that point a (- 3,2a-1) and point B (B, - 3) are symmetric with respect to the origin, what is the coordinate of the symmetric point P 'of point P (a, b) with respect to the y-axis?
About the origin symmetry, the abscissa and ordinate are opposite to each other
-3=-b
2a-1=-(-3)
b=3,a=2
P(2,3)
On Y-axis symmetry
Then p '(- 2,3)
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