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2X(5+3)=16
關於X軸和Y軸對稱是只變一個軸. 比如y-1=3(x-5)和y-1=3(-x-5)關於y對稱 (y-1)=3(x-5)和-y-1=3(x-5)關於x對稱 關於原點對稱是都要變 即y-1=3(x-5)-y-1=3(-x-5)
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