Park Pierce
09/09/2023 · Primary School
What is the value of the function \(f(x) = x^3 + 2x\) at \(x = -1\)?
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Tutor-Verified Answer
Step-by-step Solution
To find the value of the function \(f(x) = x^3 + 2x\) at \(x = -1\), we substitute \(-1\) into the function:
\[
f(-1) = (-1)^3 + 2(-1)
\]
Calculating each term:
\[
(-1)^3 = -1
\]
\[
2(-1) = -2
\]
Now, we combine these results:
\[
f(-1) = -1 - 2 = -3
\]
Thus, the value of the function at \(x = -1\) is
\[
\boxed{-3}
\]
Quick Answer
The value of the function at \(x = -1\) is -3.
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