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satzuna ®É¶¡: 2010-8-20 01:22
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¬P°¨ ®É¶¡: 2010-8-20 02:21
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jamzjam ®É¶¡: 2010-8-20 02:43
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©Ò¥HThe slope of SR=The slope of PQ The slope of PQ=(5-1)/(2-5) = -4/3
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©Ò¥HThe slope of PS x -4/3 = -1 The slope of PS = 3/4
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[y-(-2)]/x-1= -4/3 ¡÷ (y+2)/(x-1) = -4/3 ¡÷ 3y+6 = 4-4x ¡÷ 3y+4x = -2
(5-y)/(2-x) = 3/4 ¡÷ 20-4y =6-3x ¡÷ 4y - 3x =14
4y - 3x = 14 ¡÷ 4y =14 + 3x ¡÷y = (14+3x)/4
±Ny = (14+3x)/4 ©ñ¤J3y+4x = -2
3(14+3x)/4 +4x = -2 ¡÷ 3(14+3x)+16x = -8 ¡÷ 42+9x+16x=-8 ¡÷ 25x= -50 ¡÷ x = -2
±Nx=-2©ñ¤J4y -3x =14
4y - 3(-2) =14 ¡÷ 4y-(-6) =14 ¡÷4y +6 =14 ¡÷4y=8 ¡÷y=2
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satzuna ®É¶¡: 2010-8-20 12:13
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¬P°¨ ®É¶¡: 2010-8-20 13:14
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satzuna ®É¶¡: 2010-8-20 13:32
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