Combinação Linear
- Created by
- Renato Passos, Eng. de Software
- Reviewed by
- Renato Passos, Eng. de Software
Last updated: Apr 18, 2026
Formula
c = αu + βv
About this calculator
The linear combination calculator allows you to find the resulting vector from combining two 2D vectors given scalar coefficients α and β. It is useful for students and professionals working with linear algebra, analytic geometry, or physics, as it quickly provides the weighted sum vector. Simply enter the components of vectors u and v, along with the scalars, and the result is displayed immediately.
The calculation follows the formula c = αu + βv, where u = (u1, u2) and v = (v1, v2). We multiply each component of u by α, each component of v by β, and add the corresponding components: c1 = α*u1 + β*v1 and c2 = α*u2 + β*v2. The result is a new vector representing the linear combination. This operation is fundamental for understanding vector spaces and linear systems.
Use this calculator when you need to quickly check linear combinations in problems of linear dependence, linear transformations, or when solving systems of equations. It is especially useful in linear algebra classes to verify exercises or explore how different scalars alter the resulting vector. It can also be applied in computer graphics to manipulate vectors.
Caution: ensure vectors u and v have the same dimension (2D). The calculator does not validate whether the vectors are linearly independent; that depends on context. Verify that scalars α and β are real numbers. For 3D problems, this tool is not suitable. Always check if the result makes geometric sense.
Frequently asked questions
What is a linear combination?
It is an operation that multiplies each vector by a scalar and sums the results. In this case, c = αu + βv.
Can I use this calculator for 3D vectors?
No, it only works for two-dimensional (2D) vectors. For 3D, you would need a specific tool.
What does it mean if the result is the zero vector?
It means the linear combination resulted in the vector (0,0). This may indicate linear dependence if α and β are not both zero.
Can the scalars α and β be negative?
Yes, they can. They can be any real numbers, including negative and fractional.
How do I know if two vectors are linearly dependent?
If there exist scalars α and β, not both zero, such that αu + βv = 0, then u and v are linearly dependent. Use the calculator to test combinations.