tin học 11 Cho mảng A gồm N phần tử (N<=50) a) tổng các phần tử có trong mảng b) kiểm tra xem có phần tử trong mảng X không? Nếu không có thì thông báo không có. Nếu có thì đưa ra vị trí. c) Tính tích lập phương của các phần tử chẵn d) sắp xếp mảng giảm dần d) đếm số phần tử là số nguyên tố trong mảng.

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