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Mathematics, 07.09.2021 14:00 liana8

4. Cho hệ phương trình: mx+4y=1
[x+my=4
a) Giải hệ phương trình khi m = 4.

b) Tìm các giá trị của m để hệ có nghiệm duy nhất (x;y)=(5;-1).

c) Tìm các giá trị của m để hệ có nghiệm duy nhất, vô nghiệm.

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4. Cho hệ phương trình: mx+4y=1
[x+my=4
a) Giải hệ phương trình khi m = 4.

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