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4.1 Graphing in Two Dimensions • 1053210–10.5 1 1.5 2 2.5 3xMaple draws almost vertical lines near the point of a discontinuity.The option discont=true indicates that there may be discontinuities.> plot(f(x), x=0..3, discont=true);3210–10.5 1 1.5 2 2.5 3xFunctions with singularities, that is, those functions which become arbitrarilylarge at some point, constitute another special case. The functionx ↦→ 1/(x − 1) 2 has a singularity at x = 1.> plot( 1/(x-1)^2, x=-5..6 );25000020000015000010000050000–4 –2 0 2 4 6x