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8. 下列何者是二元一次方程式3x+y=7和x-y=5共同的解?(A) (B) (C) (D)
問題詳情
8. 下列何者是二元一次方程式3x+y=7和x-y=5共同的解?
(A)
(B)
(C)
(D)
參考答案
答案:D
難度:
非常簡單
0.9
書單:
沒有書單,新增
上一篇 :
7. 解二元一次聯立方程式 ,下列哪一個步驟可以消去 y ?(A)①-②÷2 (B)①×2-②×3 (C)①×2+② (D)①×3-②
下一篇 :
16. 如果a<0,b>0,則下列哪一個點在哪一象限?(請填坐標點代號)(A)(b , a)(B) (C)(b-a , a2)(D)(0 ,-b2)
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