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Question

Match the column

(1) 2x+3y=40
6x+5y=10
(a) Coincident lines
(2) 2x+3y=40
6x+9y=50
(b) Intersecting lines
(3) 2x+3y=10
4x+6y=20
(c) Parallel lines

A
1a,2b,3c
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B
1b,2a,3c
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C
1b,2c,3a
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D
1c,2a,3b
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Solution

The correct option is C 1b,2c,3a
Write the equations in the form ax+by+c=0.
Check for a1a2=b1b2=c1c2 ......(i) for coincident lines,
a1a2=b1b2c1c2 .......(ii) for parallel lines and
a1a2b1b2 .........(iii) intersecting lines.
Then
(1) 2x+3y=40,6x+5y=10
2635
These line are intersecting lines (b)
(2)2x+3y=40,6x+9y=50
26=39=134050=45
These lines are parallel lines (c)
(3)2x+3y=10,4x+6y=20
24=36=1020=12
These lines are coincident lines(a)

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