By far the most popular and well-stocked category of used instruments is our selection of guitars, where we've got a huge variety of all the big names. Used Gibson Les Paul, pre-owned Fender Telecaster and secondhand Stratocaster guitars are commonly found within these pages, waiting for their new homes with players and collectors.
22/7 is a pretty decent choice for teaching 11-year-olds about fractions that are close to pi. 355/113 would be better, if you think they can remember numbers that big. And approxRational is fun. Exercise for the interested reader: implement an inverse to approxRational.
Answer 1 : The only answer is Ï^-1i The square root of - 1 is i so i times the square root of pi is equal to the square root of negative pi Answer 2 : More concretely , the squar â¦e root of negative pi is approximately 1.772453850905i , wherein the 1.772453850905 represents an approximation of pi , and  i  , which should be a lower case cursive  ...