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發表於 2006-5-9 14:42:10
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maths mc唔識果2條
let O br the orgin.If the coordinates of the points A and B
are(6,0) and (0,6) respectively then the coordinates of
the in-centre of 三角形ABO are:
A. (0,0)
B. (2,2)
C. (3,3)
D. (6-3* root of 2,6-3* root of 2)<--我好揀左依個定係b
A circle C cuts the y-axis at A and B. IF AB=8 and the
coordinates if the centre of C are(-3,5),then the equation of C is:
A. x*x+y*y+6x-10y=0
B. x*x+y*y-6x+10y=0
C. x*x+y*y+6x-10y+9=0
D. x*x+y*y-6x+10y+9=0
一睇就知b同d錯..我好似揀左a..俾多時間我一定計倒依條 |
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