4—Differential Equations 922 These equations are separable, as in section4.7. Separate them and integrate, solving for the
dependent variable, with one arbitrary constant.
dN
dt
=−λN,
dx
dt
=a^2 +x^2 ,
dvx
dt
=−a
(
1 −e−βvx
)
3 From Eq. (4.40) and (4.41) what are the formulas for putting capacitors or inductors in series and
parallel?