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Evaluate the Determinant e7xe4x7e7x4e4x\mid \begin{array} { c c } e ^ { 7 x } & e ^ { 4 x } \\7 e ^ { 7 x } & 4 e ^ { 4 x }\end{array}

question 29

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Evaluate the determinant e7xe4x7e7x4e4x\mid \begin{array} { c c } e ^ { 7 x } & e ^ { 4 x } \\7 e ^ { 7 x } & 4 e ^ { 4 x }\end{array} in which the entries are functions.


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