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Exercise EE.C10

Find the characteristic polynomial of the matrix
A= [1 2 3 4]

library(pracma)
A <- matrix(c(1, 3, 2, 4), nrow = 2)
A

##      [,1] [,2]
## [1,]    1    2
## [2,]    3    4

A <- charpoly(A, info = TRUE)

## Error term: 4

A$cp

## [1]  1 -5 -2

A caption