Solve 4a*5=

$$4 a \times 5 =$$

Differentiate w.r.t. a

$$20$$

Steps Using Definition of a Derivative

Multiply 4 and 5 to get 20.

$$\frac{\mathrm{d}}{\mathrm{d}a}(20a)$$

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

$$20a^{1-1}$$

Subtract 1 from 1.

$$20a^{0}$$

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

$$20\times 1$$

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

$$20$$

Evaluate

$$20a$$

Solution Steps

Multiply 4 and 5 to get 20.

$$20a$$