Solve pi/frac{1{lambda}/eta}(tau

$$\frac { \pi } { \frac { 1 } { \lambda } / \eta } ( \tau$$

Evaluate

$$\pi \eta \lambda \tau$$

Solution Steps

Divide \pi by \frac{\frac{1}{\lambda }}{\eta } by multiplying \pi by the reciprocal of \frac{\frac{1}{\lambda }}{\eta }.

$$\frac{\pi \eta }{\frac{1}{\lambda }}\tau$$

Divide \pi \eta by \frac{1}{\lambda } by multiplying \pi \eta by the reciprocal of \frac{1}{\lambda }.

$$\pi \eta \lambda \tau$$

Differentiate w.r.t. λ

$$\pi \eta \tau$$