210 câu hàm số cực hay có lời giải chi tiết(p1)

Cho hàm số y=x+căn của 4-x^2 xác định trên đoạn [-2;2]

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Cho hàm số y=x+4-x2 xác định trên đoạn [-2;2]. Khẳng định nào sau đây là đúng?

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Giải thích

Đáp án D