The two matrices and their answer must be of the same dimensions.
Each element of the answer matrix is the sum of the elements in the corresponding elements on the matrices that are being added.
In algebraic form,
if A = {aij} where 1 ≤ i ≤ m, 1 ≤ j ≤ n is an mxn matrix
B = {bij} where 1 ≤ i ≤ m, 1 ≤ j ≤ n is an mxn matrix
and C = {cij} = A + B,
then C is an mxn matrix and cij = aij + bij for all 1 ≤ i ≤ m, 1 ≤ j ≤ n
Yes, because otherwise addition and subtraction are not defined.
Matrix addition is commutative if the elements in the matrices are themselves commutative.Matrix multiplication is not commutative.
two matrices are normally considered equal only if they are identical. In other words, every element in the matrix must be equal to the corresponding element in the other matrix.
You add matrices by adding their respective terms - e.g. the element in the first row and sixth column of the sum is the sum of the elements in the addends' first rows and sixth columns. Wikipedia has a nice example of matrix addition that I linked below.
Only square matrices have inverses.
The matrices must have the same dimensions.
Matrices can't be "computed" as such; only operations like multiplication, transpose, addition, subtraction, etc., can be done. What can be computed are determinants. If you want to write a program that does operations such as these on matrices, I suggest using a two-dimensional array to store the values in the matrices, and use for-loops to iterate through the values.
how to multiply two sparse matrices
The usual rules of addition of fractions apply.
Matrix arithmetic
No, you cannot add a 1x3 matrix to a 3x2 matrix because the two matrices have different dimensions. For matrix addition to be valid, both matrices must have the same dimensions. In this case, a 1x3 matrix has one row and three columns, while a 3x2 matrix has three rows and two columns, making them incompatible for addition.
Yes, because otherwise addition and subtraction are not defined.
Matrix addition is commutative if the elements in the matrices are themselves commutative.Matrix multiplication is not commutative.
no
To combine two matrices, ensure they have compatible dimensions. If you're performing addition or subtraction, both matrices must have the same dimensions. For multiplication, the number of columns in the first matrix must equal the number of rows in the second matrix. After confirming compatibility, apply the appropriate operation element-wise for addition/subtraction, or use the matrix multiplication rules for multiplication.
Commuting in algebra is often used for matrices. Say you have two matrices, A and B. These two matrices are commutative if A * B = B * A. This rule can also be used in regular binary operations(addition and multiplication). For example, if you have an X and Y. These two numbers would be commutative if X + Y = Y + X. The case is the same for X * Y = Y * X. There are operations like subtraction and division that are not commutative. These are referred to as noncommutative operations. Hope this helps!!
To write a program that performs arithmetic operations between two matrices using arrays, first define two 2D arrays to represent the matrices. Then, create functions for each arithmetic operation (addition, subtraction, multiplication, etc.) that iterate through the elements of the matrices, performing the operation element-wise. Ensure to handle cases where the matrices have different dimensions, as this would affect the validity of the operations. Finally, print the result matrix after each operation.