A radioactive sample disintegrates via two independent decay processes having half lives \(T^{(1)}_{1/2}\) and \(T^{(2)}_{1/2}\) respectively. The effective half-life, T1/2 of the nuclei is :
1
\(T_{1/2}=\frac{T^{(1)}_{1/2}T^{(2)}_{1/2}}{T^{(1)}_{1/2}+T^{(2)}_{1/2}}\)
2
\(T_{1/2}=T^{(1)}_{1/2}+T^{(2)}_{1/2}\)
3
\(T_{1/2}=\frac{T^{(1)}_{1/2}+T^{(2)}_{1/2}}{T^{(1)}_{1/2}-T^{(2)}_{1/2}}\)
4
None of the above