3

Numerical Solution of Equations of a Single Variable

This chapter focuses on numerical solution of equations of a single variable, which appear in the general form

f(x)=0(3.1)

Graphically, a solution (or root) of f(x) = 0 refers to the point of intersection of f(x) and the x-axis. Therefore, depending on the nature of the graph of f(x) in relation to the x-axis, Equation 3.1 may have a unique solution, multiple solutions, or no solution. A root of an equation can sometimes be determined analytically resulting in an exact solution in closed form. For instance, the equation e3x 2 = 0 can be solved analytically to obtain a unique solution x=13ln2. In most situations, however, this is not possible and the root(s) must be found numerically. ...

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