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Algebra (all content)

Course: Algebra (all content) > Unit 19

Lesson 5: Combined vector operations
Math
Algebra (all content)
Vectors
Combined vector operations
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Vector operations review

Google Classroom
Review the basic vector operations and perform them.

What are the basic vector operations?

Additionleft parenthesis, a, start subscript, 1, end subscript, comma, b, start subscript, 1, end subscript, right parenthesis, plus, left parenthesis, a, start subscript, 2, end subscript, comma, b, start subscript, 2, end subscript, right parenthesis, equals, left parenthesis, a, start subscript, 1, end subscript, plus, a, start subscript, 2, end subscript, comma, b, start subscript, 1, end subscript, plus, b, start subscript, 2, end subscript, right parenthesis
Subtractionleft parenthesis, a, start subscript, 1, end subscript, comma, b, start subscript, 1, end subscript, right parenthesis, minus, left parenthesis, a, start subscript, 2, end subscript, comma, b, start subscript, 2, end subscript, right parenthesis, equals, left parenthesis, a, start subscript, 1, end subscript, minus, a, start subscript, 2, end subscript, comma, b, start subscript, 1, end subscript, minus, b, start subscript, 2, end subscript, right parenthesis
Scalar multiplicationk, dot, left parenthesis, a, comma, b, right parenthesis, equals, left parenthesis, k, dot, a, comma, k, dot, b, right parenthesis
In vector addition, we add the corresponding components. In vector subtraction, we subtract the corresponding components.
Want to learn more about vector addition and subtraction? Check out this video.
In scalar multiplication, we multiply the scalar by each component.
Want to learn more about scalar multiplication? Check out this video.

Practice set 1: Adding and subtracting vectors

Problem 1.1
  • Current
u, with, vector, on top, equals, left parenthesis, 1, comma, minus, 5, right parenthesis
w, with, vector, on top, equals, left parenthesis, 8, comma, 4, right parenthesis
u, with, vector, on top, plus, w, with, vector, on top, equals, left parenthesis
  • Your answer should be
  • an integer, like 6
  • a simplified proper fraction, like 3, slash, 5
  • a simplified improper fraction, like 7, slash, 4
  • a mixed number, like 1, space, 3, slash, 4
  • an exact decimal, like 0, point, 75
  • a multiple of pi, like 12, space, start text, p, i, end text or 2, slash, 3, space, start text, p, i, end text
,
  • Your answer should be
  • an integer, like 6
  • a simplified proper fraction, like 3, slash, 5
  • a simplified improper fraction, like 7, slash, 4
  • a mixed number, like 1, space, 3, slash, 4
  • an exact decimal, like 0, point, 75
  • a multiple of pi, like 12, space, start text, p, i, end text or 2, slash, 3, space, start text, p, i, end text
right parenthesis

Want to try more problems like this? Check out this exercise.

Practice set 2: Scalar multiplication

Problem 2.1
  • Current
w, with, vector, on top, equals, left parenthesis, minus, 1, comma, minus, 3, right parenthesis
6, w, with, vector, on top, equals, left parenthesis
  • Your answer should be
  • an integer, like 6
  • a simplified proper fraction, like 3, slash, 5
  • a simplified improper fraction, like 7, slash, 4
  • a mixed number, like 1, space, 3, slash, 4
  • an exact decimal, like 0, point, 75
  • a multiple of pi, like 12, space, start text, p, i, end text or 2, slash, 3, space, start text, p, i, end text
,
  • Your answer should be
  • an integer, like 6
  • a simplified proper fraction, like 3, slash, 5
  • a simplified improper fraction, like 7, slash, 4
  • a mixed number, like 1, space, 3, slash, 4
  • an exact decimal, like 0, point, 75
  • a multiple of pi, like 12, space, start text, p, i, end text or 2, slash, 3, space, start text, p, i, end text
right parenthesis

Want to try more problems like this? Check out this exercise.

Practice set 3: Combined operations

Problem 3.1
  • Current
u, with, vector, on top, equals, left parenthesis, minus, 1, comma, minus, 7, right parenthesis
w, with, vector, on top, equals, left parenthesis, 3, comma, 1, right parenthesis
2, u, with, vector, on top, plus, left parenthesis, minus, 3, right parenthesis, w, with, vector, on top, equals
left parenthesis
  • Your answer should be
  • an integer, like 6
  • a simplified proper fraction, like 3, slash, 5
  • a simplified improper fraction, like 7, slash, 4
  • a mixed number, like 1, space, 3, slash, 4
  • an exact decimal, like 0, point, 75
  • a multiple of pi, like 12, space, start text, p, i, end text or 2, slash, 3, space, start text, p, i, end text
,
  • Your answer should be
  • an integer, like 6
  • a simplified proper fraction, like 3, slash, 5
  • a simplified improper fraction, like 7, slash, 4
  • a mixed number, like 1, space, 3, slash, 4
  • an exact decimal, like 0, point, 75
  • a multiple of pi, like 12, space, start text, p, i, end text or 2, slash, 3, space, start text, p, i, end text
right parenthesis

Want to try more problems like this? Check out this exercise.

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