Howell Potter
03/27/2024 · Primary School
Evaluate. Then interpret the result in terms of the area above and/or below the \( x \)-axis, \( \int_{-1}^{1}\left(x^{3}-3 x\right) d x \) 1 \( \int\left(x^{3}-3 x\right) d x=\square \) (Type an integer or a simplified fraction.)
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Step-by-step Solution
Calculate the integral \( \int_{-1}^{1}(x^3-3x)dx \).
Evaluate the integral by following steps:
- step0: Evaluate using formulas and rules:
\(\int_{-1}^{1} x^{3}-3x dx\)
- step1: Evaluate the integral:
\(\int x^{3}-3x dx\)
- step2: Use properties of integrals:
\(\int x^{3} dx-\int 3x dx\)
- step3: Evaluate the integral:
\(\frac{1}{4}x^{4}-\frac{3}{2}x^{2}\)
- step4: Return the limits:
\(\left(\frac{1}{4}x^{4}-\frac{3}{2}x^{2}\right)\bigg |_{-1}^{1}\)
- step5: Calculate the value:
\(0\)
The result of the integral \( \int_{-1}^{1}(x^3-3x)dx \) is 0.
Interpreting this result in terms of the area above and/or below the \( x \)-axis, the integral represents the net area between the curve \( y = x^3 - 3x \) and the \( x \)-axis from \( x = -1 \) to \( x = 1 \). Since the result is 0, it means that the area above the \( x \)-axis is equal to the area below the \( x \)-axis, resulting in a net area of 0.
Quick Answer
The integral \( \int_{-1}^{1}(x^3-3x)dx \) equals 0, indicating equal areas above and below the \( x \)-axis.
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