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Chapter 2 Non linear equations Chapter 2 Non linear equations Nguyen Thi Minh Tam ntmtam vnuagmail com October 24, 2020 1 2 1 Quadratic functions 2 2 2 Revenue, cost and profit 3 2 3 Indices and logarithms 4 2 4 Exponential and Natural logarithm functions 2 1 Quadratic functions A quadratic function is a function of the form f (x) = ax2 + bx + c, where a,b,c are constants, and a 6= 0 The graph of a quadratic function is a parabola The strategy for sketching the graph of a quadratic function f (.