Lawson Gibson
07/07/2023 · High School

Find the area between the curves. \[ x=-5, x=3, y=2 x^{2}+12, y=0 \]

UpStudy ThothAI Solution

Tutor-Verified Answer

Step-by-step Solution

要找到曲线之间的面积,我们需要计算在给定区间内两个函数之间的积分。具体步骤如下: ### 步骤 1:确定积分区间和函数 给定的曲线是: - \( x = -5 \) - \( x = 3 \) - \( y = 2x^2 + 12 \) - \( y = 0 \) ### 步骤 2:设置积分表达式 我们需要计算在 \( x = -5 \) 到 \( x = 3 \) 之间,函数 \( y = 2x^2 + 12 \) 和 \( y = 0 \) 之间的面积。面积可以通过以下积分表示: \[ \text{面积} = \int_{-5}^{3} (2x^2 + 12 - 0) \, dx \] ### 步骤 3:计算不定积分 首先,我们计算 \( 2x^2 + 12 \) 的不定积分: \[ \int (2x^2 + 12) \, dx = \int 2x^2 \, dx + \int 12 \, dx \] \[ = 2 \int x^2 \, dx + 12 \int 1 \, dx \] \[ = 2 \left( \frac{x^3}{3} \right) + 12x \] \[ = \frac{2x^3}{3} + 12x \] ### 步骤 4:计算定积分 接下来,我们计算定积分在 \( x = -5 \) 到 \( x = 3 \) 之间的值: \[ \left[ \frac{2x^3}{3} + 12x \right]_{-5}^{3} \] 将上限 \( x = 3 \) 代入: \[ \left( \frac{2(3)^3}{3} + 12(3) \right) = \left( \frac{2 \cdot 27}{3} + 36 \right) = \left( 18 + 36 \right) = 54 \] 将下限 \( x = -5 \) 代入: \[ \left( \frac{2(-5)^3}{3} + 12(-5) \right) = \left( \frac{2 \cdot (-125)}{3} - 60 \right) = \left( -\frac{250}{3} - 60 \right) = -\frac{250}{3} - \frac{180}{3} = -\frac{430}{3} \] ### 步骤 5:计算面积 最后,我们计算两个值之间的差: \[ \text{面积} = 54 - \left( -\frac{430}{3} \right) = 54 + \frac{430}{3} = \frac{162}{3} + \frac{430}{3} = \frac{592}{3} \] 所以,曲线之间的面积是: \[ \boxed{\frac{592}{3}} \]

Quick Answer

\[ \text{面积} = \frac{592}{3} \]
Answered by UpStudy AI and reviewed by a Professional Tutor
UpStudy ThothAI
Self-Developed and Ever-Improving
Thoth AI product is constantly being upgraded and optimized.
Covers All Major Subjects
Capable of handling homework in math, chemistry, biology, physics, and more.
Instant and Accurate
Provides immediate and precise solutions and guidance.
Try Now
Ask Tutors
Ask AI
10x
Fastest way to Get Answers & Solutions
By text

Enter your question here…

By image
Re-Upload
Uploaded Files
xxxx.png0%
Submit
📸 STUDY CAN BE A REAL STRUGGLE
Why Not UpStudy It?
Select your plan below
Premium

You can enjoy

  • Step-by-step explanations
  • 24/7 expert live tutors
  • Unlimited number of questions
  • No interruptions
  • Full access to answer and
    solution
Basic
  • Limited Solutions