Write another form of law of radiactive decay.

Explanation

Another form of the law of radioactive decay.
The decay rate R is defined as R = `R =-(dN)/(dt)`
Differentiating equation (iii) , we find R `= -(dN)/(dt) = lambdaN_(0)e^(-lambdat)`
`R = R_(0)e^(-lambdat)`
Where `R_(0)` is the radioactive decay rate at t = 0 and R is the radioactive decay-rate at time.