Write the system in vector matrix form: a) b) O d) O < X² 4 1 12 KH KH -21 -e e -21 14 21 -21 4 e² 1 x₂ 2 e e 4 e' -2e¹ -21 -t -e 1 x₂ -2t f) O None of the above. 4 e 2e¹ + 4 e 2e¹ X₁ -21 2e² x₂ [x₁=²¹x₁ +4e¹x₂ x₁=-e²¹x₁ +2e¹x₂]

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