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Sagot :
Given:
Axis of symmetry of a parabola is [tex]x=4[/tex].
A point on the parabola is (0,2).
To find:
The another point on the parabola.
Solution:
The point (0,2) lies on the parabola and the axis of symmetry of a parabola is [tex]x=4[/tex].
It means, the another point on the parabola is the mirror image of (0,2) across the line [tex]x=4[/tex] because the parabola is symmetric about the axis of symmetry.
If the point is reflected across the line [tex]x=4[/tex], then
[tex](x,y)\to (-(x-4)+4,y)[/tex]
[tex](x,y)\to (-x+4+4,y)[/tex]
[tex](x,y)\to (-x+8,y)[/tex]
Using this rule, we get
[tex](0,2)\to (-0+8,2)[/tex]
[tex](0,2)\to (8,2)[/tex]
Therefore, the other point on the parabola is (8,2).
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