Ok I am brand new to playing the piano and I apologize if this question seems idiotic. I am trying to learn how to play American Pie here. I realized that I was playing both a D and a D/F# the same way, I was hitting the D, F#, and A keys together. I know this is right for at least 1 of them, but I don't know if it's right for both.
Without getting into any extraneous details can you tell me the difference? All I want to know is which keys I need to press down, no more no less.
Sorry if this is a dupe.