where is the video explaining the rieman sum equal to intergral,your video said it will explained in future video but i cant find it,please tell me where is the video,really liked your
video [Inger Hohler: edited 04.27.2017 to remove email address] and also,it seem to be a bug watching khanacademy in ipad,some time it shows i am offline,when i am connected to wifi,is there anyway to fix it,or is it regional issue,cause i am in china at the moment.
Hi Xie Zhe,
is the video you are looking for this one (Rieman sums and integrals)?
The staying on a web page problem is a technical issue, not a Content request and Feedback, but before you post it as a Technical issue, please check if the problem is elsewhere than Khan Academy. Very often it is not related to which web page you are trying to access. Here's an article about connection issues with iPad Air 2. I don't know if this is your device, but similar problems have been reported for many iPads.
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