The natural frequency ωn of the system given below is
1
\(\sqrt{\frac{k_3(k_1+k_2)}{m(k_1+k_2+k_3)}}\)
2
\(\sqrt{\frac{m}{\left(\frac{k_1+k_2}{k_1k_2}+k_3\right)}}\)
3
\(\sqrt{\frac{\left(\frac{k_1+k_2}{k_1k_2}+k_3\right)}{m}}\)
4
\(\sqrt{\frac{(k_1+k_2+k_3)}{m}}\)