GMAT
题目
Let x∗∗∗=x−x2 for all non-negative integers x. Which of the following equals x2−x+x∗∗∗?
解析
因为 \(x^{***} = x - x^2\)，所以 \(x^2 - x + x - x^2 = 0\)
因为 \((1)^{***} = (1) - (1)^2 = 0\)
答案是 C。
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公众号Let x∗∗∗=x−x2 for all non-negative integers x. Which of the following equals x2−x+x∗∗∗?
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