Question 238125
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*[tex \LARGE \ \ \ \ \ \ \ \ \ \ d(x)\ =\ f(x)\ -\ g(x)\ =\ (8\ +\ x)\ -\ (x\ -\ 5)]


Just collect like terms.  And yes, it is ok to have a function definition that does not have a variable in it.  It is called a constant function and the graph is a straight horizontal line.


John
*[tex \LARGE e^{i\pi} + 1 = 0]
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