Solve 3(7a)?

$$3 ( 7 a ) ?$$

Differentiate w.r.t. a

$$21$$

Steps Using Definition of a Derivative

Multiply 3 and 7 to get 21.

$$\frac{\mathrm{d}}{\mathrm{d}a}(21a)$$

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

$$21a^{1-1}$$

Subtract 1 from 1.

$$21a^{0}$$

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

$$21\times 1$$

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

$$21$$

Evaluate

$$21a$$

Solution Steps

Multiply 3 and 7 to get 21.

$$21a$$