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freeCodeCamp/curriculum/challenges/chinese/10-coding-interview-prep/project-euler/problem-422-sequence-of-points-on-a-hyperbola.md
Oliver Eyton-Williams ee1e8abd87 feat(curriculum): restore seed + solution to Chinese (#40683)
* feat(tools): add seed/solution restore script

* chore(curriculum): remove empty sections' markers

* chore(curriculum): add seed + solution to Chinese

* chore: remove old formatter

* fix: update getChallenges

parse translated challenges separately, without reference to the source

* chore(curriculum): add dashedName to English

* chore(curriculum): add dashedName to Chinese

* refactor: remove unused challenge property 'name'

* fix: relax dashedName requirement

* fix: stray tag

Remove stray `pre` tag from challenge file.

Signed-off-by: nhcarrigan <nhcarrigan@gmail.com>

Co-authored-by: nhcarrigan <nhcarrigan@gmail.com>
2021-01-12 19:31:00 -07:00

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---
id: 5900f5131000cf542c510025
title: 问题422双曲线上的点序列
challengeType: 5
videoUrl: ''
dashedName: problem-422-sequence-of-points-on-a-hyperbola
---
# --description--
假设H是由等式12x2 + 7xy-12y2 = 625定义的双曲线。
接下来将X定义为点71。 可以看出X在H中。
现在我们将H中的点序列{Pii≥1}定义为: P1 =1361/4。 P2 =-43/6-4。 对于i> 2Pi是H中与Pi-1不同的唯一点因此线PiPi-1与线Pi-2X平行。 可以证明Pi是定义明确的并且其坐标始终是有理的。 您得到P3 =-19/2-229/24P4 =1267/144-37/12和P7 =17194218091/143327232274748766781/1719926784
用以下格式找到n = 1114的Pn如果Pn =a / bc / d其中分数是最低项而分母是正数则答案是a + b + c + dmod 1 000 007。
对于n = 7答案应该是806236837。
# --hints--
`euler422()`应该返回92060460。
```js
assert.strictEqual(euler422(), 92060460);
```
# --seed--
## --seed-contents--
```js
function euler422() {
return true;
}
euler422();
```
# --solutions--
```js
// solution required
```