Calculus Examples

$\sum_{i = 1}^{3} \frac{1}{{x_{i}}^{2}}$

Step 1

The formula for the summation of a constant is:

$\sum_{k = 1}^{n} c = c n$

Step 2

Substitute the values into the formula and make sure to multiply by the front term.

$\frac{1}{{x_{i}}^{2}} \cdot 3$

Step 3

Simplify.

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Step 3.1

Remove parentheses.

$\frac{1}{{x_{i}}^{2}} \cdot 3$

Step 3.2

Combine $\frac{1}{{x_{i}}^{2}}$ and $3$ .

$\frac{3}{{x_{i}}^{2}}$