$$n_1 \left( \frac{\delta q_1}{q_1} \right) + n_2 \left( \frac{\delta q_2}{q_2} \right) + n_3 \left( \frac{\delta q_3}{q_3} \right) $$

$$\frac{1}{n_1} \frac {\delta q_1}{q_1} + \frac{1}{n_2} \frac {\delta q_2}{q_2} + \frac{1}{n_3} \frac {\delta q_3}{q_3} $$

$$ \frac {\delta q_1}{q_1} + \frac {\delta q_2}{q_2} + \frac {\delta q_3}{q_3} $$

$$\left( \frac {\delta q_1}{q_1} \right)^{n_1} + \left( \frac {\delta q_2}{q_2} \right)^{n_2} + \left( \frac {\delta q_3}{q_3} \right)^{n_3} $$