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Question

Draw the graphs of the equations xy+1=0 and 3x+2y12=0. Determine the coordinates of the vertices of the triangle formed by these lines and the x-axis, and shade the triangular region.

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Solution

xy+1=0
xy=1 ...(i)
3x+2y12=0
3x+2y=12 ...(ii)
xy=1
y=1+x

x01
y10
Plot (0,1) and (1,2) on graph and join them to get eqn (i)
For 3x+2y=12
2y=123x
r=123x2

x04
y60
Plot point (0,6) and (4,0) on graph and join them to get eqn (ii)
ABC is the required triangle with coordinates of A as (2,3),B(1,0) and C(4,0).

497897_465369_ans.png

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