Question
Fill in the blank.
In applying one or more row operations while finding $A^{-1}$ by elementary row operations, we obtain all zeros in one or more, then $A^{-1}$ _________.

Answer

In applying one or more row operations while finding $A^{-1}$ by elementary row operations, we obtain all zeros in one or more, then $A^{-1}$ does not exist.

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Similar questions

In a classroom, teacher explains the properties of a particular curve by saying that this particular curve has beautiful up and downs. It starts at 1 and heads down until $\pi$ radian, and then heads up again and closely related to sine function and both follow each other, exactly $\frac{\pi}{2}$ radians apart as shown in figure.

Based on the above information, answer the following questions.
  1. Name the curve, about which teacher explained in the classroom.
  1. Cosine
  2. Sine
  3. Tangent
  4. Cotangent
  1. Area of curve explained in the passage from 0 to $\frac{\pi}{2}$ is.
  1. $\frac{1}{3}\text{ sq.unit}$
  2. $\frac{1}{2}\text{ sq.unit}$
  3. ${1}\text{ sq.unit}$
  4. ${2}\text{ sq.units}$
  1. Area of curve discussed in classroom from $\frac{\pi}{2}$ to $\frac{3\pi}{2}$ is.
  1. -2 sq. units
  2. 2 sq. units
  3. 3 sq. units
  4. -3 sq. units
  1. Area of curve discussed in classroom from $\frac{3\pi}{2}$ to $2\pi$ is.
  1. 1 sq. unit
  2. 2 sq. units
  3. 3 sq. units
  4. 4 sq. units
  1. Area of explained curve from 0 to $2\pi$ is.
  1. 1 sq. unit
  2. 2 sq. units
  3. 3 sq. units
  4. 4 sq. units
Fill in the blanks.
The solution of the differential equation $\text{x}\frac{\text{dy}}{\text{dx}}+2\text{y}=\text{x}^2$ is ________.
A coin and a die is thrown. The probability of getting a head on coin and even number on die is ......
The area of the region bounded by the ellipse $\frac{x^2}{a^2}+\frac{y^2}{b^2}=1$ will be ____________ .
If $y=\cos \sqrt{x}$, then the value of $\frac{d y}{d x}$ will be ________ .
In the first quadrant the area of the region bounded by the circle $x^2+y^2=(2)^2$ and lines $x=0, x=2$ will be ___________ .
Fill in the blank.
Sum of two skew symmetric matrices is always _________ matrix.
If $\left[\begin{array}{lll}3 & -2 & 0\end{array}\right]\left[\begin{array}{c}2 \\ k \\ -5\end{array}\right]=0$, then value of $k$ is _________
Any point of the feasible region which given the optimal value (maximum or minimum value) of the objective function is called __________ .
Fill in the blank.
If A is symmetric matrix, then B′AB is _________.