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A. voters felt bitter and fearful because of the loss of WW1 and the poor state of the economy. their was no civil war and Mussolini was the Fascist leader of Italy.
Answer: The term "function" was introduced by Gottfried Wilhelm Leibniz (1646-1716) almost fifty years after the publication of Geometry. The idea of a function was further formalized by Leonhard Euler (pronounced "oiler" 1707-1783) who introduced the notation for a function, y = f(x).