Question

.By changing the signs of all the elements of a matrix ,we obtained

Answer 1

So first you can check if matrix contains at least one negative element, then change sign of all elements

Answer 2

By changing the signs of all the elements of a matrix ,we obtain negative of a matrix.

• A negative matrix is an integer or real matrix with each element being a negative number, such that a (ij)0 for every I j.
• If the negative sign is taken out common of all the elements, it can be placed in multiplication.
• If the signs are again changed or negative 1 is multiplied to all the elements of matrix, it will again go back to the original matrix.
• If B is a known matrix, then

• - B= -1 [B]

• Thus, multiplying a matrix by one yields the negative value of the matrix.
• Changing the sign of a matrix means that if an element is positive, it will become negative and if an element is negative, it will become positive in the revised matrix.

By changing the signs of all the elements of a matrix ,we obtain negative of a matrix.

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