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If f(x) = x2 + 1, what is the value of f(2) + f(–2)? (A) 0 (

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sandy
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If f(x) = x2 + 1, what is the value of f(2) + f(–2)? (A) 0 ( [#permalink] New post   25 Jul 2018, 17:09
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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
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E
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sandy
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Re: If f(x) = x2 + 1, what is the value of f(2) + f(–2)? (A) 0 ( [#permalink] New post   31 Jul 2018, 14:13
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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!
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Re: If f(x) = x2 + 1, what is the value of f(2) + f(–2)? (A) 0 ( [#permalink] New post   18 Mar 2019, 20:17
why the OA is B?
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Re: If f(x) = x2 + 1, what is the value of f(2) + f(–2)? (A) 0 ( [#permalink] New post   19 Mar 2019, 04:12
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minniethakur wrote:
why the OA is B?


That was a mistake.
I've edited the question to show the correct answer as E

Cheers,
Brent
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Re: If f(x) = x2 + 1, what is the value of f(2) + f(–2)? (A) 0 ( [#permalink]
19 Mar 2019, 04:12
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