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Posted on April 22, 2022 (Updated on July 9, 2025)

What has only a trivial solution?

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The solution x = 0 is called the trivial solution. A solution x is non-trivial is x = 0. The homogeneous system Ax = 0 has a non-trivial solution if and only if the equation has at least one free variable (or equivalently, if and only if A has a column with no pivots).

What does only trivial solution mean?

A trivial solution is one that is patently obvious and that is likely of no interest. Generally, answers involving zero that reduce the problem to nothing are considered trivial. Consider: x + 4y = 0. You can solve this by just making x and y equal to zero — that’s trivial.

Does trivial solution mean unique solution?

Unique solution- has an exact solution (such as a POI of 2 intersecting lines) Trivial solution- when 0 needs to equal the zero vector in Ax=0vector.

What does a trivial solution look like?

A solution or example that is ridiculously simple and of little interest. Often, solutions or examples involving the number 0 are considered trivial. Nonzero solutions or examples are considered nontrivial. For example, the equation x + 5y = 0 has the trivial solution x = 0, y = 0.

How do you find a trivial solution?

Video quote: This homogenous system so this is kind of the way that you find trivial and non-trivial solutions. Just do row reduction. Again if you get this row of all zeros.

What are trivial and non trivial solution?

Hi Goyal, Here is the answer to your question. The system of equation in which the determinant of the coefficient is zero is called non-trivial solution. And the system of equation in which the determinant of the coefficient matrix is not zero but the solution are x=y=z=0 is called trivial solution.

What is a trivial and nontrivial solution?

A solution or example that is not trivial. Often, solutions or examples involving the number zero are considered trivial. Nonzero solutions or examples are considered nontrivial. For example, the equation x + 5y = 0 has the trivial solution (0, 0). Nontrivial solutions include (5, –1) and (–2, 0.4).

How do you determine if a system has a nontrivial solution?

Theorem 2: A homogeneous system always has a nontrivial solution if the number of equations is less than the number of unknowns.

What does it mean when a matrix has a nontrivial solution?

Any solution which has at least one component non-zero (thereby making it a non-obvious solution) is termed as a “non-trivial” solution.

Does the equation Ax 0 have a nontrivial solution?

The homogeneous equation Ax = 0 has a nontrivial solution if and only if the equation has at least one free variable.

What does it mean when Ax 0 only has the trivial solution?

Answer: To say that the columns of A span Rn is the same as saying that Ax = b has a solution for every b in Rn. But if Ax = 0 has only the trivial solution, then there are no free variables, so every column of A has a pivot, so Ax = b can never have a pivot in the augmented column.

What is the trivial solution in linear algebra?

Definition. A vector is called trivial if all its coordinates are 0, i. e. if it is the zero vector. In Linear Algebra we are not interested in only finding one solution to a system of linear equations.

Can ax 0 have infinite solutions?

A homogeneous system of equations Ax = 0 will have a unique solution, the trivial solution x = 0, if and only if rank[A] = n. In all other cases, it will have infinitely many solutions.

Can Ax B have multiple solutions?

The system of equations Ax = b has either no solution, exactly one solution, or infinitely many solutions.

How do you know if Ax B has infinite solutions?

If A is a square matrix, then if A is invertible every equation Ax = b has one and only one solution. Namely, x = A’b. 2. If A is not invertible, then Ax = b will have either no solution, or an infinite number of solutions.

How do you know if Ax B has a solution for every B?

Ax = b has a solution if and only if b is a linear combination of the columns of A. Theorem 4 is very important, it tells us that the following statements are either all true or all false, for any m × n matrix A: (a) For every b, the equation Ax = b has a solution.

Is ax b consistent for all B?

A consistent system involving free variables will have infinitely many solutions. A has only 6 linearly independent column vectors, so column vectors will span R6. Since the columns vectors span R6, by (2), the system Ax = b will be consistent for any choice of b.

Is y ax b the same as Y MX B?

A linear equation can be written as y=mx+b, y=ax+b or even y=a+bx. These equations can all represent the same graphs, assuming a horizontal x-axis and a vertical y-axis. In Algebra, the equation of a line is represented by y = mx + b, where m is the slope and b is the y-intercept.

How do you find Ax B?

Video quote: So remember those solve ax equals 0 there's as many of them as free as there are free variables in our case there's only one. And we get it by setting all three variables equal to 0 except.

What is ax in matrices?

1.4 The Matrix Equation Ax = b. Definition. If A is an m × n matrix, with columns a1,…, an, and if x is in Rn, then the product of A. and x, denoted by Ax, is the linear combination of the columns of A using the corresponding entries in x as.

What is an ax and B matrix?

The principle in which using a matrix to solve a system of equations is based on, is that every matrix equation Ax=b corresponds to a vector equation which happens to coincide on its solutions, thus we can related them as a system of different algebraic expressions with different variables.

What’s a matrix equation?

Definition. A matrix equation is an equation of the form Ax = b , where A is an m × n matrix, b is a vector in R m , and x is a vector whose coefficients x 1 , x 2 ,…, x n are unknown.

How many solutions does an equation have?

If solving an equation yields a statement that is true for a single value for the variable, like x = 3, then the equation has one solution. If solving an equation yields a statement that is always true, like 3 = 3, then the equation has infinitely many solutions.

What is vector equation?

A vector equation is an equation involving a linear combination of vectors with possibly unknown coefficients. Asking whether or not a vector equation has a solution is the same as asking if a given vector is a linear combination of some other given vectors.

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