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Math Software  -> Graph Function (Graph Calculus) -> Graphing Inequality
Function Grapher and Visual Calculus have the ability of graphing inequality. Inequality must be in the form of f(x, y)<0 (Cartesian coordinate) or f(a,r)<0 (polar coordinate).

Following figure shows the graph of inequality a-r<0 (polar coordinate).

 

Math Software -> Graph Function (Graph Calculus) -> Graphing Inequality

 

 

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