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Clearnote
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Junior High
Mathematics
求解,謝謝
Mathematics
Junior High
Resolved
about 2 yearsago
Rin
求解,謝謝
請閱讀下列敘述後,回答13~14題 小樂解二元一次聯立方程式 20+ lax+by [2x+3y K-HB2《數學2 a、b為兩數。他發現無法算出,後來才知道題目後 面有一句話他漏看了,那句話為此聯立方程式的解 同時也是4x+5y=3的解,於是小樂就能正確解出 聯立方程式的解。 (D) 13. 小樂解出的(x,y)=? (A) (-2,1) xx+by=2 (B)(-1,2) 14x+5y=3 y=-1 (C)(1,-2) 2x-3=1 2x=4 x=2 (D)(2,-1) y=2 )14.小樂接著算下去,題目要求-6a+3b的值為 何,則-6a+ 3b = ? (A)-24 (B)-16 (C) 16 (D) 24 二、填充題:每題5分,共30分 的解,則a+26 = 若x=a,y=b為二元一次聯立方程式 -2 |x-4y=1 (x = 2y -2y=1 2 x=-
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真真
about 2 yearsago
14、
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真真
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