The function R(x) + S(x) exists given by
.
<h3>What is a function?</h3>
An expression, rule, or law that describes a relationship between one variable (independent variable) and another variable (dependent variable) exists named a function.
Let the functions be
and 
Adding both of the equations, we get

simplifying both of the equations we get


Therefore, the function R(x) + S(x) exists given by
.
To learn more about function refer to:
brainly.com/question/12431044
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