Merge pull request #48 from Liam-Yang/master

修正week3中误写成代码格式的数学公式，并对神经网络课后练习增加一张手绘图便于理解

Huang Haiguang committed 7y ago

344da9194946bb4ed8e8109e49f4ef445fed66a3

Committed by GitHub <noreply@github.com> on 5/9/2019, 12:09:37 AM