circuits eléctrics: condensadors, resistències y bobines

V(t) = ( a_{1}+...+a_{n} )·q(t)
V(t) = ( (1/a_{1})+...+(1/a_{n}) )^{(-1)}·q(t)


V(t) = ( R_{1}+...+R_{n} )·d_{t}[q(t)]
V(t) = ( (1/R_{1})+...+(1/R_{n}) )^{(-1)}·d_{t}[q(t)]


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


V(t) = ( ∑ a_{i} )·( ∑ (1/a_{k}) )·( ∑ a_{j} )·q(t)
V(t) = ( ( ∑ (1/a_{i}) )·( ∑ a_{k} )·( ∑ (1/a_{j}) ) )^{(-1)}·q(t)


V(t) = ( ∑ R_{i} )·( ∑ (1/R_{k}) )·( ∑ R_{j} )·d_{t}[q(t)]
V(t) = ( ( ∑ (1/R_{i}) )·( ∑ R_{k} )·( ∑ (1/R_{j}) ) )^{(-1)}·d_{t}[q(t)]


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