設甲數為整數,且|甲數+2|<=3.8,請問甲數可能是哪些數,求算式。?

2018-10-07 4:47 pm

回答 (2)

2018-10-07 6:26 pm
✔ 最佳答案
設甲數為整數,且|甲數+2|<=3.8,請問甲數可能是哪些數,求算式?
Sol
|甲數+2|<=3.8
-3.8<=甲數+2<=3.8
-3.8-2<=甲數<=3.8-2
-5.8<=甲數<=1.8
-5<=甲數<=1
可能是-5,-4,-3,-2,-1,0,1
2018-10-07 5:00 pm
|甲數+2|<=3.8
--> -3.8 <= 甲數+2 <= 3.8
--> -3.8-2 <= 甲數+2-2 <= 3.8-2
--> -1.8 <= 甲數 <= 1.8
甲數為整數
所以甲數 = -1 或 0 或 1 ...ans


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