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The Maxima on-line user's manual

Algebra Calculator

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Second

Function: second (<expr>) Returns the 2nd item of expression or list <expr>. See first for more details.

eq1: (Vin2-Vin)/R1 + (Vin2-Va)/(1/(C1*s)) = 0;
eq2: (Va-Vin2)/(1/(C1*s)) + Va/(1/(C2*s)) + Va/R2 + (Va-Vb)/(1/(C3*s)) = 0;
eq3: (Vb-Va)/(1/(C3*s)) + Vb/R3 + (Vb-Vc)/R4 = 0;
eq4: (Vc-Vb)/R4 + Vc/(1/(C4*s)) + (Vc-Vout)/(1/(C5*s)) = 0;
eq5: (Vout-Vc)/(1/(C5*s)) + Vout/R5 = 0;
Vin2_1: solve(eq1, Vin2);
Vin2_2: solve(eq2, Vin2);
solve(second(Vin2_1[1]) = second(Vin2_2[1]), Va);
Va_2: solve(eq3, Va);

There are also some inexact matches for second. Try ?? second to see them.

(%o1)                                true
(%i2) 

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