Westonci.ca is the Q&A platform that connects you with experts who provide accurate and detailed answers. Discover comprehensive solutions to your questions from a wide network of experts on our user-friendly platform. Connect with a community of professionals ready to help you find accurate solutions to your questions quickly and efficiently.
Sagot :
To find the area bounded by the curve \(y = x|x|\), the \(x\)-axis, and the ordinates \(x = 1\) and \(x = -1\), we can break the analysis into two segments: one for \(x\) in the interval \([-1, 0]\) and one for \(x\) in the interval \([0, 1]\).
### For \(0 \le x \le 1\):
In this interval, \(x\) is non-negative, so \(|x| = x\). Therefore, the equation \(y = x|x|\) simplifies to:
[tex]\[ y = x \cdot x = x^2. \][/tex]
We need to find the area under the curve \(y = x^2\) from \(x = 0\) to \(x = 1\). We do this by integrating \(x^2\) with respect to \(x\):
[tex]\[ \text{Area}_{\text{positive}} = \int_{0}^{1} x^2 \, dx. \][/tex]
Evaluating this integral:
[tex]\[ \int_{0}^{1} x^2 \, dx = \left[\frac{x^3}{3}\right]_{0}^{1} = \frac{1^3}{3} - \frac{0^3}{3} = \frac{1}{3}. \][/tex]
### For \(-1 \le x < 0\):
In this interval, \(x\) is negative, so \(|x| = -x\). Therefore, the equation \(y = x|x|\) simplifies to:
[tex]\[ y = x \cdot (-x) = -x^2. \][/tex]
We need to find the area under the curve \(y = -x^2\) from \(x = -1\) to \(x = 0\). We do this by integrating \(-x^2\) with respect to \(x\):
[tex]\[ \text{Area}_{\text{negative}} = \int_{-1}^{0} -x^2 \, dx. \][/tex]
Evaluating this integral:
[tex]\[ \int_{-1}^{0} -x^2 \, dx = -\int_{-1}^{0} x^2 \, dx = -\left[\frac{x^3}{3}\right]_{-1}^{0} = -\left(\frac{0^3}{3} - \frac{(-1)^3}{3}\right) = -\left(0 - \left(-\frac{1}{3}\right)\right) = -\left(0 + \frac{1}{3}\right) = -\frac{1}{3}. \][/tex]
### Total Area Bounded:
The total area bounded by the curve and the \(x\)-axis in the interval \([-1, 1]\) is obtained by adding the absolute values of the areas from the two segments:
[tex]\[ \text{Total Area} = \text{Area}_{\text{positive}} + \text{Area}_{\text{negative}} = \frac{1}{3} + \left(-\frac{1}{3}\right) = 0. \][/tex]
Hence, the area bounded by the curve \(y = x|x|\), the \(x\)-axis, and the ordinates \(x = 1\) and \(x = -1\) is:
[tex]\( \boxed{0} \)[/tex].
### For \(0 \le x \le 1\):
In this interval, \(x\) is non-negative, so \(|x| = x\). Therefore, the equation \(y = x|x|\) simplifies to:
[tex]\[ y = x \cdot x = x^2. \][/tex]
We need to find the area under the curve \(y = x^2\) from \(x = 0\) to \(x = 1\). We do this by integrating \(x^2\) with respect to \(x\):
[tex]\[ \text{Area}_{\text{positive}} = \int_{0}^{1} x^2 \, dx. \][/tex]
Evaluating this integral:
[tex]\[ \int_{0}^{1} x^2 \, dx = \left[\frac{x^3}{3}\right]_{0}^{1} = \frac{1^3}{3} - \frac{0^3}{3} = \frac{1}{3}. \][/tex]
### For \(-1 \le x < 0\):
In this interval, \(x\) is negative, so \(|x| = -x\). Therefore, the equation \(y = x|x|\) simplifies to:
[tex]\[ y = x \cdot (-x) = -x^2. \][/tex]
We need to find the area under the curve \(y = -x^2\) from \(x = -1\) to \(x = 0\). We do this by integrating \(-x^2\) with respect to \(x\):
[tex]\[ \text{Area}_{\text{negative}} = \int_{-1}^{0} -x^2 \, dx. \][/tex]
Evaluating this integral:
[tex]\[ \int_{-1}^{0} -x^2 \, dx = -\int_{-1}^{0} x^2 \, dx = -\left[\frac{x^3}{3}\right]_{-1}^{0} = -\left(\frac{0^3}{3} - \frac{(-1)^3}{3}\right) = -\left(0 - \left(-\frac{1}{3}\right)\right) = -\left(0 + \frac{1}{3}\right) = -\frac{1}{3}. \][/tex]
### Total Area Bounded:
The total area bounded by the curve and the \(x\)-axis in the interval \([-1, 1]\) is obtained by adding the absolute values of the areas from the two segments:
[tex]\[ \text{Total Area} = \text{Area}_{\text{positive}} + \text{Area}_{\text{negative}} = \frac{1}{3} + \left(-\frac{1}{3}\right) = 0. \][/tex]
Hence, the area bounded by the curve \(y = x|x|\), the \(x\)-axis, and the ordinates \(x = 1\) and \(x = -1\) is:
[tex]\( \boxed{0} \)[/tex].
Thank you for choosing our platform. We're dedicated to providing the best answers for all your questions. Visit us again. Thank you for choosing our platform. We're dedicated to providing the best answers for all your questions. Visit us again. We're dedicated to helping you find the answers you need at Westonci.ca. Don't hesitate to return for more.