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Question

If a pair of linear equations is inconsistent then their graph lines will be

(a) parallel (b) always coincident

(c) always intersecting (d) intersecting or coincident

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Solution

onsider the equation of the lines to be-

a subscript 1 x plus b subscript 1 y plus c subscript 1 equals 0 space a n d a subscript 2 x plus b subscript 2 y plus c subscript 2 equals 0

Let both the lines to be parallel to each other, then there exists no solution, because the lines never intersect.

Linear Equation- Having no solution ( Parallel Lines)

Algebraically, for such a case, a subscript 1 over a subscript 2 equals b subscript 1 over b subscript 2 not equal to c subscript 1 over c subscript 2 and the pair of linear equations in two variables is said to be inconsistent.

As shown in the graph above, the pair of linesa subscript 1 x plus b subscript 1 y plus c subscript 1 equals 0 space a n d space a subscript 2 x plus b subscript 2 y plus c subscript 2 equals 0 are parallel to each other. Therefore, there exists no solution for such a pair.
so option a is correct


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