Finding out eigen-values and eigen-vectors of matrices.

For a 3x3 matrix, how many eigenvalues are possible?
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Eigenvalues of a matrix are obtained from:
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An eigenvector of a matrix represents:
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If λ is an eigenvalue and v is its eigenvector, then:
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Eigenvalues can be:
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The zero vector cannot be an eigenvector because:
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Eigenvalues help determine:
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For an identity matrix, eigenvalues are:

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Eigenvectors corresponding to different eigenvalues are usually:
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Eigenvalue computation is widely used in:
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