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Calculus: Early Transcendentals
8th Edition
ISBN:9781285741550
Author:James Stewart
Publisher:James Stewart
Chapter1: Functions And Models
Section: Chapter Questions
Problem 1RCC: (a) What is a function? What are its domain and range? (b) What is the graph of a function? (c) How...
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30 & 35 please be accurate

### Question

**30.** Evaluate the integral:  
\[
\int (2 + x + 2x^2 + e^x) \, dx
\]

### Explanation

This problem requires finding the indefinite integral of the function \(2 + x + 2x^2 + e^x\) with respect to \(x\). The expression inside the integral combines polynomial terms with the exponential function \(e^x\). Each term can be integrated separately using basic integration rules:

- The integral of a constant \(a\) is \(ax + C\).
- The integral of \(x^n\) is \(\frac{x^{n+1}}{n+1} + C\), where \(n \neq -1\).
- The integral of \(e^x\) is \(e^x + C\).

Apply these rules to solve the integral, representing the result in a clear and simplified form.
Transcribed Image Text:### Question **30.** Evaluate the integral: \[ \int (2 + x + 2x^2 + e^x) \, dx \] ### Explanation This problem requires finding the indefinite integral of the function \(2 + x + 2x^2 + e^x\) with respect to \(x\). The expression inside the integral combines polynomial terms with the exponential function \(e^x\). Each term can be integrated separately using basic integration rules: - The integral of a constant \(a\) is \(ax + C\). - The integral of \(x^n\) is \(\frac{x^{n+1}}{n+1} + C\), where \(n \neq -1\). - The integral of \(e^x\) is \(e^x + C\). Apply these rules to solve the integral, representing the result in a clear and simplified form.
### Integral Problem

**Problem 35: Evaluate the integral**

\[
\int \left( \sqrt{x} + \frac{2}{\sqrt{x}} \right) \, dx
\]

---

This problem involves finding the indefinite integral of the sum of two functions: the square root of \(x\) and the reciprocal of the square root of \(x\) multiplied by 2. 

**Steps for solving:**

1. **Decompose the integral** into two separate integrals:
   \[
   \int \sqrt{x} \, dx + \int \frac{2}{\sqrt{x}} \, dx
   \]

2. **Integrate each part individually:**
   - For the first integral, use the power rule for integrals:
     \[
     \int x^{1/2} \, dx = \frac{x^{3/2}}{3/2} = \frac{2}{3} x^{3/2} + C_1
     \]
   - For the second integral, rewrite the integrand in exponential form and apply the power rule:
     \[
     \int 2x^{-1/2} \, dx = 2 \cdot \frac{x^{1/2}}{1/2} = 4x^{1/2} + C_2
     \]

3. **Combine the results:**
   \[
   \frac{2}{3} x^{3/2} + 4x^{1/2} + C
   \]

Where \(C\) is the constant of integration representing an indefinite integral.
Transcribed Image Text:### Integral Problem **Problem 35: Evaluate the integral** \[ \int \left( \sqrt{x} + \frac{2}{\sqrt{x}} \right) \, dx \] --- This problem involves finding the indefinite integral of the sum of two functions: the square root of \(x\) and the reciprocal of the square root of \(x\) multiplied by 2. **Steps for solving:** 1. **Decompose the integral** into two separate integrals: \[ \int \sqrt{x} \, dx + \int \frac{2}{\sqrt{x}} \, dx \] 2. **Integrate each part individually:** - For the first integral, use the power rule for integrals: \[ \int x^{1/2} \, dx = \frac{x^{3/2}}{3/2} = \frac{2}{3} x^{3/2} + C_1 \] - For the second integral, rewrite the integrand in exponential form and apply the power rule: \[ \int 2x^{-1/2} \, dx = 2 \cdot \frac{x^{1/2}}{1/2} = 4x^{1/2} + C_2 \] 3. **Combine the results:** \[ \frac{2}{3} x^{3/2} + 4x^{1/2} + C \] Where \(C\) is the constant of integration representing an indefinite integral.
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