help for an exercise answer

The size of two vectors is given by the following commands:

>> size(a)

ans = 5 1

>> size(b)

ans = 1 5

Which operation is allowed? Multiple propositions can be true.

a + b

a' - b

a * b

a' * b

a - b

[Steven Lord]

Why don't you tell us which ones you think are allowed and which ones you don't (and why you think that way) and we can tell you whether you're right or not (and if you tell us your reasoning, we can explain why.)

Answer 1

[Dyuman Joshi]

A simple way is to define 2 vectors (choose values as per your liking) of the given size and find out which are allowed and which are not.

If you want to learn more about the topic in hand, refer to -

Compatible Array Sizes for Basic Operations

Array vs. Matrix Operations

Answer 2

[Jerbin J]

a + b,a' - b,a * b,a - b

These operations can be performed.

a'*b,cannot be performed because:Incorrect dimensions for matrix multiplication.