Math Problem Statement

(b) A vector in a coordinate plane is expressed by using components. In Figure II, the vector π˜‚ has initial point (x, y) = 2,1

and terminal point (x, y) = 3,2

. In component form we write π˜‚ = , and π˜ƒ = . Then 2π˜‚ =

and π˜‚ + π˜ƒ = .

Solution

Solution:

  1. Find the vector π˜‚ in component form: A vector in component form is expressed as: u=⟨x2βˆ’x1,y2βˆ’y1⟩\mathbf{u} = \langle x_2 - x_1, y_2 - y_1 \rangle Here, the initial point is (x1,y1)=(2,1)(x_1, y_1) = (2, 1) and the terminal point is (x2,y2)=(3,2)(x_2, y_2) = (3, 2).

    Subtract the coordinates: u=⟨3βˆ’2,2βˆ’1⟩=⟨1,1⟩\mathbf{u} = \langle 3 - 2, 2 - 1 \rangle = \langle 1, 1 \rangle

    So: u=⟨1,1⟩\mathbf{u} = \langle 1, 1 \rangle

  2. Vector π˜ƒ is not given, but assuming it has coordinates (𝑣ₓ, 𝑣ᡧ): v=⟨vx,vy⟩\mathbf{v} = \langle v_x, v_y \rangle

  3. Find 2u2\mathbf{u}: Multiply each component of u\mathbf{u} by 2: 2u=2β‹…βŸ¨1,1⟩=⟨2,2⟩2\mathbf{u} = 2 \cdot \langle 1, 1 \rangle = \langle 2, 2 \rangle

  4. Find u+v\mathbf{u} + \mathbf{v}: Add the corresponding components of u\mathbf{u} and v\mathbf{v}: u+v=⟨1+vx,1+vy⟩\mathbf{u} + \mathbf{v} = \langle 1 + v_x, 1 + v_y \rangle

    If the values of vxv_x and vyv_y are specified, substitute them into this formula to get the final result.


Final Answers:

  1. π˜‚ = ⟨1,1⟩\langle 1, 1 \rangle
  2. 2π˜‚ = ⟨2,2⟩\langle 2, 2 \rangle
  3. π˜‚ + π˜ƒ = ⟨1+vx,1+vy⟩\langle 1 + v_x, 1 + v_y \rangle

Would you like more details or have any specific values for v\mathbf{v}? Let me know!

Related Questions:

  1. How do you determine the magnitude of a vector given its components?
  2. What is the unit vector of u=⟨1,1⟩\mathbf{u} = \langle 1, 1 \rangle?
  3. How do you find the dot product of two vectors?
  4. What is the geometric interpretation of vector addition and scalar multiplication?
  5. How do you determine the angle between two vectors using their components?

Tip: Always represent vectors in their component form for easy calculations and visualization in coordinate geometry.

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Math Problem Analysis

Mathematical Concepts

Vectors
Component Form of a Vector
Vector Addition
Scalar Multiplication

Formulas

Component form of a vector: π˜‚ = ⟨xβ‚‚ - x₁, yβ‚‚ - yβ‚βŸ©
Scalar multiplication: kπ˜‚ = k⟨x, y⟩ = ⟨kx, ky⟩
Vector addition: π˜‚ + π˜ƒ = ⟨x₁ + xβ‚‚, y₁ + yβ‚‚βŸ©

Theorems

Basic properties of vectors (addition and scalar multiplication)

Suitable Grade Level

Grades 9-12