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眷戀莉子: 直線3x+4y-5=0的斜率:-3/4 令y=0,則3x-5=0,x=5/3 ∴直線3x+4y-5=0在x軸的截距為5/3 令x=0,則4y-5=0,y=5/4 ∴直線3x+4y-5=0在y軸的截距為5/4
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