Hello, How can I find the ' on the app? I want to write y' or dy/dx and seems impossible! i've already sent 2 e-mails and nobody knows how to help me. Thanks!
Do you see the button at the bottom left side that has ".?123" in it? It's the button that brings up puncutation. You can also find it in the button that brings up calculus symbols
http://blog.wolframalpha.com/data/uploads/2010/02/iphone-math_keyboard1.gif
that is on web! my question os about the app for iphone. there isn't that option there!