Solve B(4,2)

$$B ( 4,2 )$$

Differentiate w.r.t. B

$$4,2$$

Steps Using Definition of a Derivative

The derivative of ax^{n} is nax^{n-1}.

$$4,2B^{1-1}$$

Subtract 1 from 1.

$$4,2B^{0}$$

For any term t except 0, t^{0}=1.

$$4,2\times 1$$

For any term t, t\times 1=t and 1t=t.

$$4,2$$

Evaluate

$$\frac{21B}{5}$$