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Suppose that the functions r and s are defined for all real numbers x as follows.
r(x) = 5x
s(x) = 3x+1
Write the expressions for (r+s) (x) and (r-s) (x) and evaluate (r.s) (3).
(r + s)(x) = [
(r-s)(x) = [
(r's)(3) =