Chapters

## Exercise 1

Prove, without developing, that the following determinants are zero:    ## Exercise 3

Prove that the following determinants are a multiple of 5 and 4 respectively, without developing them.  ## Exercise 4

Prove, without developing, that the following determinant is a multiple of 15: ## Exercise 5

Prove, without developing. ## Exercise 6

Solve the following equations without developing the determinants.  ## Exercise 7

Prove that the following determinant is divisible by 21: ,

## Solution of exercise 1

Prove, without developing, that the following determinants are zero:   2. It has two proportional lines. The third column equals the sum of the first two.

## Solution of exercise 2

Knowing that |A|=5, calculate the value of the other determinants.     ## Solution of exercise 7

Prove that the following determinant is divisible by 21:    Need a Maths teacher?

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Emma

I am passionate about travelling and currently live and work in Paris. I like to spend my time reading, gardening, running, learning languages and exploring new places.