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Question

Solve the following pairs of linear equations, graphically :
2x3y=6 and xy2=1

A
(3,2)
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B
(3,3)
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C
(4,4)
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D
(3,4)
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Solution

The correct option is C (3,4)
Given,
2x3y=6
y=2x3+2
Substituting different values of x to get corresponding values of y, we get
(0,2),(3,4),(6,6),(3,0)
Plotting these points on the graph, we get the graph of the equation, 2x3y=6
Similarly, given second equation,
xy2=1
y=2(x1)
Substituting different values of x to get corresponding values of y, we get
(1,0),(0,2),(2,2),(1,4),(3,4)
Plotting these points on the graph, we get the graph of the equation, y=2(x1).
The point of intersection of the graphs of the lines is the solution of the equations which is (3,4).
405388_178281_ans.jpg

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