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Which is the graph of the piecewise function f(x)? f(x)=[tex]f(x) = \left \{ {{-x+1, x\leq 0 } \atop {x+1, x\ \textgreater \ 0}} \right.[/tex]

Which describes the difference between the graph of f(x)=x^2 and g(x)=-(x^2-2)

Need asap. solve for the following inequality