|x + 1| − |x − 1| = x https://www.wolframalpha.com/input?i=+%7Cx+%2B+1%7C+%E2%88%92+%7Cx+%E2%88%92+1%7C+%3D+x&lang=ja グラフ |x + 1| − |x − 1| ,x https://www.wolframalpha.com/input?i=+%7Cx+%2B+1%7C+%E2%88%92+%7Cx+%E2%88%92+1%7C+%2Cx&lang=ja
|x + 1| − |x − 1| = x
https://www.wolframalpha.com/input?i=+%7Cx+%2B+1%7C+%E2%88%92+%7Cx+%E2%88%92+1%7C+%3D+x&lang=ja
グラフ
|x + 1| − |x − 1| ,x
https://www.wolframalpha.com/input?i=+%7Cx+%2B+1%7C+%E2%88%92+%7Cx+%E2%88%92+1%7C+%2Cx&lang=ja