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Sum of Series Calculator

Math
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Calculates the sum of an arithmetic or geometric series.

How To Use

How to use this calculator

Start with your values, or try a preset.

Step 1

Enter First Term (a₁), Number of Terms (n), Series Type, Common Difference (d) - for Arithmetic Series, and Common Ratio (r) - for Geometric Series in the units shown.

Step 2

Read Sum of Geometric Series, Sum of Arithmetic Series, and Total Sum in the results panel. Results update as you change the inputs.

Step 3

Choose a preset to load an example, then adjust the values for your situation.

Worked Examples

Example calculations

See the inputs and their calculated results.

Arithmetic Series - Example 1

First Term (a₁): 1; Number of Terms (n): 5; Series Type: Arithmetic; Common Difference (d) - for Arithmetic Series: 2; Common Ratio (r) - for Geometric Series: 2

Sum of Geometric Series: 0; Sum of Arithmetic Series: 25; Total Sum: 25

Arithmetic Series - Example 2

First Term (a₁): 2; Number of Terms (n): 10; Series Type: Arithmetic; Common Difference (d) - for Arithmetic Series: 3; Common Ratio (r) - for Geometric Series: 2

Sum of Geometric Series: 0; Sum of Arithmetic Series: 155; Total Sum: 155

Geometric Series - Example 1

First Term (a₁): 1; Number of Terms (n): 4; Series Type: Geometric; Common Difference (d) - for Arithmetic Series: 2; Common Ratio (r) - for Geometric Series: 2

Sum of Geometric Series: 15; Sum of Arithmetic Series: 0; Total Sum: 15

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