f = -9i+40j Find: -9f f=i-j g=12i+ 3j Find: -4f-10g u = -9i+4j Find: -5u

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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### Complex Numbers and Vector Operations

#### Problem 1:
Given:
\[ f = -9i + 40j \]

Find:
\[ -9f \]

#### Problem 2:
Given:
\[ f = i - j \]
\[ g = 12i + 3j \]

Find:
\[ -4f - 10g \]

#### Problem 3:
Given:
\[ u = -9i + 4j \]

Find:
\[ -5u \]

#### Problem 4:
Given:
\[ u = 5i + 7j \]
\[ v = -2i - 11j \]

Find:
\[ -5u + 2v \]

### Vector Operations Explanation

#### Problem 1: Scaling a Vector
To find \(-9f\), you scale each component of the vector \(f\) by \(-9\).

#### Problem 2: Linear Combination of Vectors
To find \(-4f - 10g\), you scale the vector \(f\) by \(-4\) and the vector \(g\) by \(-10\), then add the results.

#### Problem 3: Scaling a Vector
To find \(-5u\), you scale each component of the vector \(u\) by \(-5\).

#### Problem 4: Linear Combination of Vectors
To find \(-5u + 2v\), you scale the vector \(u\) by \(-5\) and the vector \(v\) by \(2\), then add the results.

### Concept Review
- **Scaling** a vector involves multiplying each component of the vector by a scalar.
- **Linear combination** of vectors involves scaling multiple vectors and then adding them together component-wise.
Transcribed Image Text:### Complex Numbers and Vector Operations #### Problem 1: Given: \[ f = -9i + 40j \] Find: \[ -9f \] #### Problem 2: Given: \[ f = i - j \] \[ g = 12i + 3j \] Find: \[ -4f - 10g \] #### Problem 3: Given: \[ u = -9i + 4j \] Find: \[ -5u \] #### Problem 4: Given: \[ u = 5i + 7j \] \[ v = -2i - 11j \] Find: \[ -5u + 2v \] ### Vector Operations Explanation #### Problem 1: Scaling a Vector To find \(-9f\), you scale each component of the vector \(f\) by \(-9\). #### Problem 2: Linear Combination of Vectors To find \(-4f - 10g\), you scale the vector \(f\) by \(-4\) and the vector \(g\) by \(-10\), then add the results. #### Problem 3: Scaling a Vector To find \(-5u\), you scale each component of the vector \(u\) by \(-5\). #### Problem 4: Linear Combination of Vectors To find \(-5u + 2v\), you scale the vector \(u\) by \(-5\) and the vector \(v\) by \(2\), then add the results. ### Concept Review - **Scaling** a vector involves multiplying each component of the vector by a scalar. - **Linear combination** of vectors involves scaling multiple vectors and then adding them together component-wise.
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