Answer
a) 3; b) 0.
Work Step by Step
a) Determine $(f+g)(3)$:
$(f+g)(3)=f(3)+g(3)=2+1=3$
b) Determine $(f/g)(2)$:
$(f/g)(2)=\dfrac{f(2)}{g(2)}=\dfrac{0}{2}=0$
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