22afc2a0ca
Co-authored-by: Oliver Eyton-Williams <ojeytonwilliams@gmail.com> Co-authored-by: Kristofer Koishigawa <scissorsneedfoodtoo@gmail.com> Co-authored-by: Beau Carnes <beaucarnes@gmail.com>
66 lines
914 B
Markdown
66 lines
914 B
Markdown
---
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id: 5900f4571000cf542c50ff6a
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challengeType: 5
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isHidden: false
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title: 'Problem 235: An Arithmetic Geometric sequence'
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forumTopicId: 301879
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---
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## Description
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<section id='description'>
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Given is the arithmetic-geometric sequence u(k) = (900-3k)rk-1.
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Let s(n) = Σk=1...nu(k).
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Find the value of r for which s(5000) = -600,000,000,000.
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Give your answer rounded to 12 places behind the decimal point.
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</section>
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## Instructions
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<section id='instructions'>
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</section>
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## Tests
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<section id='tests'>
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```yml
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tests:
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- text: <code>euler235()</code> should return 1.002322108633.
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testString: assert.strictEqual(euler235(), 1.002322108633);
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```
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</section>
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## Challenge Seed
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<section id='challengeSeed'>
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<div id='js-seed'>
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```js
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function euler235() {
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// Good luck!
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return true;
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}
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euler235();
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```
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</div>
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</section>
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## Solution
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<section id='solution'>
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```js
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// solution required
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```
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</section>
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