HP 40gs hp 40gs_user's guide_English_E_HDPMSG40E07A.pdf - Page 97

hp40g+.book Page 1 Friday, December 9, 2005 1:03 AM 8 Linear Solver aplet About the Linear Solver aplet The Linear Solver aplet allows you to solve a set of linear equations. The set can contain two or three linear equations. In a two-equation set, each equation must be in the form ax + by = k . In a three-equation set, each equation must be in the form ax + by + cz = k . You provide values for a, b, and k (and c in threeequation sets) for each equation, and the Linear Solver aplet will attempt to solve for x and y (and z in threeequation sets). The hp40gs will alert you if no solution can be found, or if there is an infinite number of solutions. Note that the Linear Solver aplet only has a numeric view. Getting started with the Linear Solver aplet The following example defines a set of three equations and then solves for the unknown variables. Open the Linear Solver aplet 1. Open the Linear Sequence aplet. Select Linear Solver The Linear Equation Solver opens. Choose the equation set 2. If the last time you used the Linear Solver aplet you solved for two equations, the twoequation input form is displayed (as in the Linear Solver aplet 8-1