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Determine whether the statement is true or false. Justify your answer. If a system of three linear equations is inconsistent, then its graph has no points common to all three equations.

Short Answer

Expert verified
The statement is True. If a system of three linear equations is inconsistent, it means there is no common solution to all the equations. In the graphical interpretation, this means there is no point common to all three lines.

Step by step solution

01

Define inconsistency

When we say a system of equations is inconsistent, we mean there is no solution that satisfies all equations simultaneously. This implies there are no common points between all equations.
02

Understand the graphical representation of this system

If you were to graph these equations, what you'd end up with are three lines that do not intersect at any single point. They may intersect each other in pairs, but there is no single point that belongs to all three lines.

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Key Concepts

These are the key concepts you need to understand to accurately answer the question.

Inconsistent Systems
In the world of mathematics, particularly in dealing with systems of linear equations, an inconsistent system is one where the equations do not meet at a single common solution. You can imagine this scenario as trying to find a single point that will satisfy all equations simultaneously, but failing to do so.

In more practical terms, consider you have three different linear equations. If they form an inconsistent system, then no single point on the graph will lie on all three of these lines at once.

The inconsistency means that there is no combination of variables that will satisfy all equations in the system at the same time. Remember, even if some lines might intersect, there can be no point where all lines intersect together. This is why inconsistent systems are said to have no solutions at all.
Graphical Representation
Visualizing systems of linear equations through graphs can often make abstract concepts much clearer. When you graph each equation in a system of linear equations, each one produces a unique line.

For systems that are inconsistent, these lines will never all cross at a single, common point. You might see instances where pairs of lines intersect each other, but crucially, they will not form a single intersection point where all three lines meet together.

This characteristic provides a visual way to identify an inconsistent system: look for the absence of a common intersection among all the lines. It's useful to visualize and draw these graphs to get a better understanding of where and why a solution does not exist.
Intersection of Lines
The concept of intersection is pivotal when discussing systems of equations. An intersection on a graph represents a solution that satisfies all the equations involved. Whenever two lines intersect on a graph, their meeting point is a solution common to those two equations.

In the context of three lines representing a system of three linear equations, the same idea holds. However, in inconsistent systems, the key issue is that there is no single point where all three lines come together.

This absence of a common intersection point implies that the system has no solution that works for all equations. Instead, you might find intersections between two lines at a time, but such points are not common to all three lines. Recognizing this is vital to understanding the nature of inconsistent systems.

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