Với giá trị nào của m thì hệ $\left\{\begin{array}{c}x+2y-z=1\\ x+3y+2z=2\\ 2x+5y+z=m+5\end{array}\right.$ có vô số nghiệm

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Một số câu hỏi khác có thể bạn quan tâm.

• Choose the best answer for the following sentence:

  They are ___________________________.
   

• Choose the best answer for the following sentence:

  We have got a lot of ____________________________.
   

• Choose the best answer for the following sentence:

  They'd like to spend the weekend at ________________________.
   

• Choose the best answer for the following sentence:

  The ticket agent said that the plane would be boarding at ________________________.
   

• Choose the best answer for the following sentence:

   Sending _________________________ ''Special Delivery'' costs about fifteen times as much as sending it ''Regular Delivery''.
  
  

• Find a mistake in the four underlined parts of the sentence and correct it:

  No one came to see us since we bought these bloodhounds.

• Find a mistake in the four underlined parts of the sentence and correct it:

  He asked me if I had gone out last night or I had been tired.

• Find a mistake in the four underlined parts of the sentence and correct it:

  The shopkeeper warned the boys don’t lean their bicycles against his windows.

• Find a mistake in the four underlined parts of the sentence and correct it:

  If your soccer team will win the championship tomorrow, we will have a big celebration for

  you.

• Find a mistake in the four underlined parts of the sentence and correct it:

  She told me to read it for myself if I didn’t believe what he says.