Solve 987x100

$$987 x 100$$

Evaluate

$$987x_{100}$$

Steps For Long Multiplication

First line up the numbers vertically and match the places from the right like this.

$$\begin{array}{c}\phantom{\times99}987\\\underline{\times\phantom{99}100}\\\end{array}$$

Now multiply the first number with the 1^{st} digit in 2^{nd} number to get intermediate results. That is Multiply 987 with 0. Write the result 0 at the end leaving 0 spaces to the right like this.

$$\begin{array}{c}\phantom{\times99}987\\\underline{\times\phantom{99}100}\\\phantom{\times99999}0\\\end{array}$$

Now multiply the first number with the 2^{nd} digit in 2^{nd} number to get intermediate results. That is Multiply 987 with 0. Write the result 0 at the end leaving 1 spaces to the right like this.

$$\begin{array}{c}\phantom{\times99}987\\\underline{\times\phantom{99}100}\\\phantom{\times99999}0\\\phantom{\times9999}0\phantom{9}\\\end{array}$$

Now multiply the first number with the 3^{rd} digit in 2^{nd} number to get intermediate results. That is Multiply 987 with 1. Write the result 987 at the end leaving 2 spaces to the right like this.

$$\begin{array}{c}\phantom{\times99}987\\\underline{\times\phantom{99}100}\\\phantom{\times99999}0\\\phantom{\times9999}0\phantom{9}\\\underline{\phantom{\times}987\phantom{99}}\\\end{array}$$

Now add the intermediate results to get final answer.

$$\begin{array}{c}\phantom{\times99}987\\\underline{\times\phantom{99}100}\\\phantom{\times99999}0\\\phantom{\times9999}0\phantom{9}\\\underline{\phantom{\times}987\phantom{99}}\\\phantom{\times}98700\end{array}$$

Differentiate w.r.t. x_100

$$987$$

Steps Using Definition of a Derivative

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

$$987x_{100}^{1-1}$$

Subtract 1 from 1.

$$987x_{100}^{0}$$

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

$$987\times 1$$

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

$$987$$