Question

explain multiplication of a vector with real number and scalar​

Answer 1

Answer:

When a vector is multiplied by a scalar quantity, then the magnitude of the vector changes in accordance with the magnitude of the scalar but the direction of the vector remains unchanged. ... The vector \overrightarrow {-a} represents the negative or additive inverse of the vector \overrightarrow {a} .

Answer 2

When a vector is multiplied by a scalar quantity, then the magnitude of the vector changes in accordance with the magnitude of the scalar but the direction of the vector remains unchanged.

When a vector is multiplied with a positive number, that number is multiplied with the magnitude of that vector leaving the direction intact. But a negative number negates the vector, i.e., its direction reverses.