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19. 有一算式(50-□)×(□+10),其中兩個□內規定皆填入相同的正整數。例如:當□填入 1時,(50-1)×(1+10)=539,即此算式的值為 539。求此算式的最大值為何?(A) 800
問題詳情
19. 有一算式(50-□)×(□+10),其中兩個□內規定皆填入相同的正整數。例如:當□填入 1時,(50-1)×(1+10)=539,即此算式的值為 539。求此算式的最大值為何?
(A) 800
(B) 900
(C) 1000
(D) 無限大
參考答案
答案:B
難度:
計算中
-1
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