kahashi021107

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Tìm gtri của m để pt sau có nghiệm kép : m^2x^2-mx-2=0

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MinhThu007

6 tháng trước

Đáp án+Giải thích các bước giải:

`m^2x^2-mx-2=0(1)`

ĐKXĐ: `mne0`

Để phương trình (1) có nghiệm kép thì `Δ=0`

`<=>(-m)^2-4m^2.-2=0`

`<=>m^2+8m^2=0`

`<=>9m^2=0`

`<=>m^2=0`

`<=>m=0(Loại)`

Vậy không có giá trị nào của `m ` để phương trình `(1)` có nghiệm kép

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Tìm gtri của m để pt sau có nghiệm kép : m^2x^2-mx-2=0

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việt nam dành độc lập vào năm nào

Choose the best answer.
I think you should buy ___ pack of mineral water instead. And you can also buy _ snacks such as potato crisps, 3 kilos of mandarins, 2 kilos of apples, 3 bunches of bananas, ____ cookies and soft candies.

Choose the best answer.
We should decorate our living room with _ orange banner. We also need ____ ribbons, balloons, party hats and costume.

Choose the best answer.
I think that ______ cauliflower is not enough for 3 people. Let’s buy one more.

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Tìm gtri của m để pt sau có nghiệm kép : m^2x^2-mx-2=0

1 câu trả lời

Viết một đoạn văn hoàn chỉnh về lý do học tiếng Anh bằng cách đưa ra các manh mối ( ko chép mạng nhá)

việt nam dành độc lập vào năm nào

Choose the best answer.I think you should buy _____ pack of mineral water instead. And you can also buy _____ snacks such as potato crisps, 3 kilos of mandarins, 2 kilos of apples, 3 bunches of bananas, ______ cookies and soft candies.

Choose the best answer.We should decorate our living room with _____ orange banner. We also need ________ ribbons, balloons, party hats and costume.

Choose the best answer.I think that ______ cauliflower is not enough for 3 people. Let’s buy one more.

Đề thi - đề kiểm tra Xem thêm

Choose the best answer.
I think you should buy ___ pack of mineral water instead. And you can also buy _ snacks such as potato crisps, 3 kilos of mandarins, 2 kilos of apples, 3 bunches of bananas, ____ cookies and soft candies.

Choose the best answer.
We should decorate our living room with _ orange banner. We also need ____ ribbons, balloons, party hats and costume.

Choose the best answer.
I think that ______ cauliflower is not enough for 3 people. Let’s buy one more.