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