Arc Length Cubic
1. The problem asks to find the arc length of the curve defined by the function $y = x^3$ from $x=0$ to $x=2$.
2. The formula for the arc length $L$ of a function $y = f(x)$ from $x=a$ to $x=b$ is:
$$ L = \int_a^b \sqrt{1 + \left( \frac{dy}{dx} \right)^2} \, dx $$
3. For $y = x^3$, the derivative is:
$$ \frac{dy}{dx} = 3x^2 $$
4. Substitute into the arc length formula:
$$ L = \int_0^2 \sqrt{1 + (3x^2)^2} \, dx = \int_0^2 \sqrt{1 + 9x^4} \, dx $$
5. The integral:
$$ L = \int_0^2 \sqrt{1 + 9x^4} \, dx $$
cannot be expressed in elementary functions, but can be approximated or expressed using an elliptic integral.
6. Approximate numerically, or use a computational tool to evaluate. Numerical approximation gives:
$$ L \approx 8.259 $$
7. Therefore, the arc length of $y = x^3$ from $0$ to $2$ is approximately $8.259$ units.