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Question

Determine whether the following lines are consistent or inconsistent:
2x+y6=0,4x2y4=0

A
The graph is coincident straight line.
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B
The graph is intersecting lines
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C
Inconsistent
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D
None of these
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Solution

The correct option is B The graph is intersecting lines
Comparing 2x+y6=0 with a1x+b1y+c1=0, we get, a1=2,b1=1,c1=6
and 4x2y4=0 with a2x+b2y+c2=0, we geta2=4,b2=2,c2=4
Now
a1a2=24=12
b1b2=12
Here,
a1a2b1b2
The equations are consistent and have exactly one solution. i.e the graph are intersecting lines.


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