Precalculus Examples

$\sum_{K = 1}^{5} 2 k$

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.

$(2 k) (5)$

Step 3

Simplify.

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Step 3.1

Remove parentheses.

$(2 k) (5)$

Step 3.2

Multiply $5$ by $2$ .

$10 k$