Brand new to the forum, and looking for some small directional advice from someone who has the above product or something close. I purchased the item on eBay and, manuals being what they are these days, mine lacked anything explicit on saving a created function (ex: f[x,y] = 5x + y).
The goal seems simple enough, but a YouTube search was unproductive. I can readily create and use a function, but am unable to save it for future use (???). I saw other seemingly-older Sharp models utilize the save button in conjunction with other functions labeled F1 thru F4, but my model does not have those destination buttons. For all of its capability, I am now wondering if my model is lacking this basic feature. Strange if it does. Any help would be appreciated.