Question

$$\frac { 16 a ^ { 2 } b ^ { 2 } } { 12 a ^ { 2 } b ^ { 3 } + 20 a ^ { 3 } b ^ { 2 } }$$

Evaluate

$\frac{4}{5a+3b}$

Show Solution

Differentiate w.r.t. b

$-\frac{12}{\left(5a+3b\right)^{2}}$