## Null vector :

A null vector, also known as a zero vector, is a vector with a magnitude of zero. This means that it has no direction or magnitude, and it is often represented as a vector with all components equal to zero. In other words, a null vector is a vector that has no effect on any vector it is added to or subtracted from.

One example of a null vector is the vector (0,0). This vector has no magnitude or direction, and it cannot be used to represent any physical quantity. However, it can be used as a reference point or origin in a coordinate system. For example, if we have a two-dimensional coordinate system with the x-axis and y-axis, the point (0,0) represents the origin. Any vector with a magnitude and direction can be represented by an arrow pointing from the origin to the endpoint of the vector.

Another example of a null vector is the vector (0,0,0). This vector is often used in three-dimensional space to represent the origin of a coordinate system. Just like the two-dimensional example, any vector with a magnitude and direction can be represented by an arrow pointing from the origin to the endpoint of the vector.

Null vectors are important in mathematics because they play a crucial role in vector operations. For example, when two vectors are added together, the result is a new vector that has the same direction as the original vectors but with a magnitude equal to the sum of the magnitudes of the original vectors. However, if one of the vectors is a null vector, the result will be the same as the other vector. This is because a null vector has no effect on any vector it is added to or subtracted from.

For example, let’s consider the vectors (2,4) and (0,0). When these vectors are added together, the result is the vector (2,4). This is because the null vector (0,0) has no effect on the vector (2,4). Similarly, if we subtract the null vector (0,0) from the vector (2,4), the result will be the same as the original vector (2,4).

In addition to vector operations, null vectors are also important in linear algebra. A null vector is a vector that is a solution to a linear equation, which means that it satisfies all the conditions of the equation. For example, let’s consider the linear equation 2x + 3y = 0. A null vector for this equation is (0,0), because it satisfies all the conditions of the equation.

In conclusion, a null vector is a vector with a magnitude of zero, which means that it has no direction or magnitude. It is often represented as a vector with all components equal to zero and is used as a reference point or origin in a coordinate system. Null vectors are important in mathematics because they play a crucial role in vector operations and are also solutions to linear equations.