4.甲:若a≠0,則 0 ÷ a = a ÷ 0 = 0乙:若a代表任意數,則 0 × a = a × 0 = 0丙:若c≠0則 ( a + b ) ÷ c = a ÷ c+b ÷ c丁:若b, c均
問題詳情
4.甲:若a≠0,則 0 ÷ a = a ÷ 0 = 0乙:若a代表任意數,則 0 × a = a × 0 = 0丙:若c≠0則 ( a + b ) ÷ c = a ÷ c+b ÷ c丁:若b, c均不為0且b+c≠0則 a ÷ ( b + c ) = a ÷ b+a ÷ c以上四個敘述,何者為真 (A)甲乙丙丁 (B)甲乙 (C)乙丙 (D)乙