Em vừa bấm casio xong thì thấy mệnh đề A đúng

Cách bấm là anh bấm nguyên cái tích phân đó xong rùi trừ cho  căn bậc hai của(0.52.5 hoặc 4) sau đó lấy trừ của nó là bik ngay
Số a chắc chắn phải lớn hơn 0->căn của a cũng lớn hơn 0...nếu kết quả cho lớn hơn 0 thì chắc chắn câu A

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