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If f(x) = x2 + 1, what is the value of f(2) + f(–2)? (A) 0 (
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25 Jul 2018, 17:09
25 Jul 2018, 17:09
Expert Reply
00:00
Question Stats:
78% (00:18) correct
21% (00:15) wrong based on 61 sessions
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If \(f(x) = x^2 + 1\), what is the value of \(f(2) + f(-2)\)?
(A) 0
(B) 1
(C) 4
(D) 5
(E) 10
(A) 0
(B) 1
(C) 4
(D) 5
(E) 10
Re: If f(x) = x2 + 1, what is the value of f(2) + f(–2)? (A) 0 (
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31 Jul 2018, 14:13
31 Jul 2018, 14:13
Expert Reply
Explanation
Use the notation “f(x)” and “f(2)” as an indication to substitute 2 for x in the given equation:
\(f(2) = (2)^2 + 1\)
\(f(2) = 5\)
Likewise, plug –2 in for x:
\(f(–2) = (-2)^2 + 1\)
\(f(-2) = 5\)
Now add: 5 + 5 = 10.
Hence option E is correct!
Use the notation “f(x)” and “f(2)” as an indication to substitute 2 for x in the given equation:
\(f(2) = (2)^2 + 1\)
\(f(2) = 5\)
Likewise, plug –2 in for x:
\(f(–2) = (-2)^2 + 1\)
\(f(-2) = 5\)
Now add: 5 + 5 = 10.
Hence option E is correct!
Re: If f(x) = x2 + 1, what is the value of f(2) + f(–2)? (A) 0 (
[#permalink]
18 Mar 2019, 20:17
18 Mar 2019, 20:17
why the OA is B?
