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Solve the following inequalities graphically in two-dimensional plane:

   

Solution:

The given inequality is

   

Let us draw a solid line

   

in the graph (∵

   

is included in the given question)

Let us Consider

   

A point

   

⇒ 

   

⇒ 

   

(this is true)

Therefore, Solution region of

   

is above the line

   

. (That is origin is included in the region)

The graph is represented as: