Relations And Functions Practice Questions Ques17
Question: If $f(x) = x^2$ and $g(x) = x+1$, what is $(f+g)(3)$?
Options:
(A) 13
(B) 12
(C) 9
(D) 15
Show Answer
Answer: A
Explanation:
(A) Correct. $(f+g)(3) = f(3) + g(3) = 3^2 + (3+1) = 9 + 4 = 13$
(B) Incorrect. This would be the result if $g(x) = x$ instead of $x+1$
(C) Incorrect. This is the result of $f(3)$ alone
(D) Incorrect. This would be the result if $g(x) = x+3$ instead of $x+1$
BETA
