Calculus Examples

$\sum_{k = 5}^{8} 5 a$

Step 1

Expand the series for each value of $k$ .

$5 a + 5 a + 5 a + 5 a$

Step 2

Substitute the values back and simplify $5 a + 5 a + 5 a + 5 a$ .

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Step 2.1

Add $5 a$ and $5 a$ .

$10 a + 5 a + 5 a$

Step 2.2

Add $10 a$ and $5 a$ .

$15 a + 5 a$

Step 2.3

Add $15 a$ and $5 a$ .

$20 a$