circuits eléctrics amb bobines y condensadors

( L_{1}+...+L_{n} )·d_{tt}^{2}[q(t)] + ( a_{1}+...+a_{n} )·q(t) = V(t)


( (1/L_{1})+...+(1/L_{n}) )^{(-1)}·d_{tt}^{2}[q(t)] + ( (1/a_{1})+...+(1/a_{n}) )^{(-1)}·q(t) = V(t)


( ∑ L_{j} )·( ∑ (1/L_{k}) )·( ∑ L_{i} )·d_{tt}^{2}[q(t)] + ...
... ( ∑ a_{j} )·( ∑ (1/a_{k}) )·( ∑ a_{i} )·q(t) = V(t)


( ( ∑ (1/L_{j}) )·( ∑ L_{k} )·( ∑ (1/L_{i}) ) )^{(-1)}·d_{tt}^{2}[q(t)] + ...
... ( ( ∑ (1/a_{j}) )·( ∑ a_{k} )·( ∑ (1/a_{i}) ) )^{(-1)}·q(t) = V(t)