- #1
viet_jon
- 131
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Homework Statement
say there's a matrix with rows
2 , 3 , h
4, 6, 7
Homework Equations
The Attempt at a Solution
I tried to rref it, but don't know what to do next.
viet_jon said:or
v1 = (1, -3, 2)
v2 = (-3, 9, -6)
v3 = (5, -7, h)
the question reads, for what values of h is v3 in span(v1,v2), and for what values of h is (v1, v2, v3) linearly dependent?
I've went over the chapter twice, but still can't find a way to do this. I understand the concept of the chapter (linearly dependency), but it shows no examples of questions like these.
In post #7, you have a different set of vectors. Which is the right set of vectors?v1 = (1, -3, 2)
v2 = (-3, 9, -6)
v3 = (5, -7, h)
Mark44 said:I hope this is a different problem from the first one you posted in this thread. I don't see any connection between them.
For this problem, v2 = -3 * v1, or equivalently, v1 = -1/3 * v2.
What does that tell you about the linear dependence or independence of these two vectors?
What does that tell you about span{v1, v2}?
v1 and v2 are linearly dependent.
For v3 to be in span{v1, v2} there must be constants a and b such that v3 = a*v1 + b*v2. Is there some value of h for which there is a solution to this equation?
there are no values...right?
Now for the the second question, if you have two vectors that are linearly independent, and you add a third vector, is the new set still linearly independent? Answer: Sometimes it is, and sometimes it isn't. If the new vector is a linear combination of the first two, the new set is linearly dependent. (The new vector is in the span of the first two vectors.) If the new vector is not a linear combination of the first two, the new set is linearly independent. (The new vector is not in the span of the first two vectors.)
If you have two vectors that are linearly dependent, and you add a third vector, is the new set linearly dependent or linearly independent? Answer: The new set is always linearly dependent.
This paragraph I understand pretty well. I still don't know how to find h though.
viet_jon said:sorry, I am a little slow...I still don't understand.
the answer in the back, shows no h is possible.
I think it would be easier to understand for me, if we used a question with a definitive answer.
v1 = {1, -1, 4}
v2 = {3, -5, 7}
v3 = {-1, 5, h}
the answer is suppose to be 6.
L-Algebra is a branch of mathematics that deals with linear transformations and their representation in matrix form. It involves the manipulation and solving of equations involving matrices and vectors.
In L-Algebra, h is found by solving a system of linear equations involving matrices. This can be done by using various methods such as Gaussian elimination, Cramer's rule, or matrix inversion.
L-Algebra has various applications in science, including physics, engineering, computer science, and statistics. It is used to model and solve systems of linear equations in these fields, as well as in data analysis and image processing.
Some key properties of L-Algebra include linearity, associativity, and distributivity. These properties allow for efficient manipulation and solving of linear equations involving matrices and vectors.
Yes, L-Algebra is used in many real-world applications, such as in electrical circuits, chemical reactions, and economic models. It is also used in computer graphics and machine learning algorithms.