Chapter 17: Activities 485
Solving a System of Nonlinear EquationsSolving a System of Nonlinear EquationsSolving a System of Nonlinear EquationsSolving a System of Nonlinear Equations
Problem
ProblemProblem
Problem
Using a graph, solve the equation x3N2x=2cos(x). Stated another way, solve the system
of two equations and two unknowns: y = x3N2x and y = 2cos(x). Use ZOOM factors to
control the decimal places displayed on the graph.
Procedure
ProcedureProcedure
Procedure
1. Press z. Select the default mode settings. Press o. Turn off all functions and stat
plots. Enter the functions.
2. Press q 4 to select 4:ZDecimal. The display shows that two solutions may exist
(points where the two functions appear to intersect).
3. Press q ~ 4 to select 4:SetFactors from the ZOOM MEMORY menu. Set XFact=10
and YFact=10.