+4.31. Let a(s) be a unit speed curve with kt = 0. Prove there is a curve
B(s) (s not arc length on B) so that a and B are Bertrand curves if and
only if there are constants 2 #0 and u with 1/2 = K + ut.
T
itan Dhan aviat

This activity will you meet these educational goals: mathematical practices-you will make sense of problems and solve them, reason abstractly and quantitatively, and usemathematics to model real-world situations.directionsread the instructions for this self-checked activity type in your response to each question, and check your answers. at theend of the activity, write a brief evaluation of your work.