Let m and j be two nxn matrices such that
jmj-1=
0 1 0 0
0 0 2 0
0 0 0 1
4 0 0 0
compute the determinant of m.

  -8

Step-by-step explanation:

The determinant of the given matrix is the determinant of M.

It is convenient to find the cofactor of the value 4. It is the opposite of the determinant of the diagonal matrix

whose determinant is the product of the diagonal elements.

Since all the other elements of row 4 of the given matrix are zero, the determinant of M is the product of 4 and -2:

  4(-2) = -8

18a

step-by-step explanation:

simply because it is. it's the highest common factor

according to this law, when unemployment goes up by 1%, gdp drops by 2%. in the question, unemployment rate goes from 2% to 5%, meaning unemployment goes up by 3%, so the gdp drops by 6%. thus the effect is a drop in gdp by 6%.

step-by-step explanation: