Mathematics
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為什麼不能用(2,1)(8,5)兩點到線距離相同
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257=. 54x+3y=3 37-47=-4 7=1 X = 0 點(2,1)對ax + by =-3的對稱點為(8,5),求數對(a,b) = -6 s ga+ b b = 0 (241) 29+6+3 = (80+ 56+3)

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