2. The length of the strings on a grand piano are chosen to obtain the required pitch (or fundamental frequency). Modern pianos are usually tuned so that, letting n be the nth key from the left, and fo is the lowest pitch, the pitch f is f(n) = (2) 12 fo. (This will be discussed later in this course.) Let to be the length of the string associated with the lowest pitch fo. Show that for some o, the lengths ( of the strings have the pattern ((n) = early. What is a