Calculus Examples

$\sum_{x = 3}^{4} 7 x$

Step 1

Expand the series for each value of $x$ .

$7 \cdot 3 + 7 \cdot 4$

Step 2

Simplify.

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Step 2.1

Multiply $7$ by $3$ .

$21 + 7 \cdot 4$

Step 2.2

Multiply $7$ by $4$ .

$21 + 28$

Step 2.3

Add $21$ and $28$ .

$49$

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$[\begin{array}{c} x^{2} & \frac{1}{2} \\ \sqrt{π} & \int x d x \end{array}]$