Casio FX-9860GII-L-IH User Guide - Page 165
Procedure, Result Screen, Example, To solve the following simultaneous linear equations
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4-1-2 Simultaneous Linear Equations Example To solve the following simultaneous linear equations for x, y, and z 4x + y - 2z = - 1 x + 6y + 3z = 1 - 5x + 4y + z = - 7 Procedure 1 m EQUA 2 1(SIML) 2(3) 3 ewbw-cw-bw bwgwdwbw -fwewbw-hw 4 1(SOLV) Result Screen # Internal calculations are performed using a 15digit mantissa, but results are displayed using a 10-digit mantissa and a 2-digit exponent. # Simultaneous linear equations are solved by inverting the matrix containing the coefficients of the equations. For example, the following shows the solution (x1, x2, x3) of a simultaneous linear equation with three unknowns. x1 x2 = x3 a1 b1 c1 -1 d1 a2 b2 c2 d2 a3 b3 c3 d3 Because of this, precision is reduced as the value of the determinant approaches zero. Also, simultaneous equations with three or more unknowns may take a very long time to solve. # An error occurs if the calculator is unable to find a solution. # After calculation is complete, you can press 1 (REPT), change coefficient values, and then re-calculate. 20050401