# Question: Show that the structure function for a four component system that

Show that the structure function for a four-component system that functions if and only if components 1 and 2 function and at least one of components 3 or 4 functions is given by

ɸ(X1, X2, X3, X4) X1 X2 max (X3, X4).

ɸ(X1, X2, X3, X4) X1 X2 max (X3, X4).

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