filmscanners: 4000 dpi question

[Sisk98]

I just received the Polaroid sprintscan 4000 slide scanner.  I;m new to 
scanning. I would like to print 11x17 inch prints on my Epson 1200. My 
question is..what should I scan my slides or negatives at to achieve the best 
results. 4000dpi?? I apologize if this question has been asked many times; 
I;m new to this forum