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4. 下列各組數中,哪一組不是二元一次方程式2x − 5y − 1 = 0的解?(A)x = 3、y = 1 (B) x = −2、y = −1(C)x = 2、y = 1 (D) x = 、y =
問題詳情
4. 下列各組數中,哪一組不是二元一次方程式2x − 5y − 1 = 0的解?
(A)x = 3、y = 1
(B) x = −2、y = −1
(C)x = 2、y = 1
(D) x = 、y = 0
參考答案
答案:C
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oooready
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直接將每組 x,y 代入式子2x − 5☆ − 1 ...
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3. 若 A(ab,b−a)在直角坐標平面上的第二象限,則B(a,b)落在第幾象限內?(A) 一 (B) 二 (C) 三 (D) 四
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