Math Problem Statement

The set { [3, 5, 2], [5, 1, -3] } is linearly independent.

Solution

The image presents two vectors:

v1=[352],v2=[513]\mathbf{v}_1 = \begin{bmatrix} 3 \\ 5 \\ 2 \end{bmatrix}, \quad \mathbf{v}_2 = \begin{bmatrix} 5 \\ 1 \\ -3 \end{bmatrix}

The question is whether this set of vectors is linearly independent.

Determining Linear Independence:

Two vectors are linearly independent if the only solution to the equation:

c1v1+c2v2=0c_1 \mathbf{v}_1 + c_2 \mathbf{v}_2 = 0

is c1=c2=0c_1 = c_2 = 0. If there exist non-zero scalars c1c_1 and c2c_2 such that the above equation holds, the vectors are linearly dependent.

We can check this by setting up the following system of equations:

c1[352]+c2[513]=[000]c_1 \begin{bmatrix} 3 \\ 5 \\ 2 \end{bmatrix} + c_2 \begin{bmatrix} 5 \\ 1 \\ -3 \end{bmatrix} = \begin{bmatrix} 0 \\ 0 \\ 0 \end{bmatrix}

This gives the system:

  1. 3c1+5c2=03c_1 + 5c_2 = 0
  2. 5c1+1c2=05c_1 + 1c_2 = 0
  3. 2c13c2=02c_1 - 3c_2 = 0

Solving this system can show whether the only solution is the trivial one (c1=0,c2=0c_1 = 0, c_2 = 0).

Solving the system:

From equation (2):

c2=5c1c_2 = -5c_1

Substitute this into equations (1) and (3):

  1. 3c1+5(5c1)=03c_1 + 5(-5c_1) = 0 3c125c1=022c1=0c1=0\Rightarrow 3c_1 - 25c_1 = 0 \Rightarrow -22c_1 = 0 \Rightarrow c_1 = 0
  2. Using c1=0c_1 = 0 in c2=5c1c_2 = -5c_1, we get c2=0c_2 = 0.

Thus, the only solution is c1=0c_1 = 0 and c2=0c_2 = 0, meaning the vectors are linearly independent.

Conclusion:

The statement in the image is False because the set of vectors is linearly independent. Therefore, the correct answer should have been True.

Would you like further details or clarification on the solution?

Here are 5 related questions to expand on this topic:

  1. What is the geometric interpretation of linear independence for two vectors?
  2. How can the concept of linear independence be extended to more than two vectors?
  3. What is the difference between linear dependence and linear independence?
  4. How does the determinant relate to checking linear independence for a system of vectors?
  5. Can vectors in R3\mathbb{R}^3 ever be linearly dependent if they are non-parallel?

Tip: When checking for linear independence with two vectors, if one vector is a scalar multiple of the other, they are linearly dependent.

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Math Problem Analysis

Mathematical Concepts

Linear Algebra
Linear Independence

Formulas

c1 * v1 + c2 * v2 = 0
c1 = 0, c2 = 0

Theorems

Linear Independence Criterion

Suitable Grade Level

Grades 10-12 (College Level)