Which equation is true for transient equilibriunn?

$(\mathrm{\lambda }=\text{ disintegration constant; }\mathrm{t}=\text{ half-life })$

.Radioactive equilibrium is when the decay rate of a radioactive isotope equals the production rate of that isotope by another source. If we multiply the decay constant ( λ ), which is radioactive-activity-per-second, by the number of atoms available to decay (N) we get a radioactive decay rate