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طراحی صفحه / پاسخ : دستور واژه نامه دو ستونی فارسی به انگلیسی
« : اكتبر 04, 2014, 06:04:30 pm »
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$$ f(2x-y)+ f(y)=2f(x) + 2f(x-y) $$
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$$f(2y-z)+ f(z)=2f(y) + 2f(y-z) $$
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$$ f(2z -x)+ f(x)=2f(z) + 2f(z-x) \quad ( 4.9) $$