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## Homework Statement

Let A be an nxn matrix, and suppose A has n real eigenvalues lambda_1, .....lambda_n repeated according to multiplicities. Prove that det A = lambda_1....lambda_n

## Homework Equations

None

## The Attempt at a Solution

Could someone explain what is meant by 'repeated according to multiplicities'? and give me a hint as to how to start this proof? thank u ~~