From 6febd5de0bdab997c66a12b23b391dc7c41f606d Mon Sep 17 00:00:00 2001
From: Kaipeng Lu <jackchess@qq.com>
Date: Mon, 1 Feb 2016 14:33:52 +0800
Subject: [PATCH] e<sub>x<sub> to e<sup>x<sup>

---
 docs/number.md | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/docs/number.md b/docs/number.md
index b861132..1080ee5 100644
--- a/docs/number.md
+++ b/docs/number.md
@@ -512,7 +512,7 @@ ES6新增了4个对数相关方法。
 
 **（1） Math.expm1()**
 
-`Math.expm1(x)`返回e<sub>x</sub> - 1，即`Math.exp(x) - 1`。
+`Math.expm1(x)`返回e<sup>x</sup> - 1，即`Math.exp(x) - 1`。
 
 ```javascript
 Math.expm1(-1); // -0.6321205588285577