' File: XIX_ArcLen1
' Find the arc length:  y = x^(3/5)       -1 < x < 1
' Solve for x:  x = y^(5/3) to avoid a discontinuous derivative from x^(3/5).
Y{t} = t                :  Yp{t} = Diff[Y,t]
X{t} = t^(5/3 )     :  Xp{t} = Diff[X,t]

a = -1  : b = 1
' - - - - - - - - - - - - - - - - - - - - - - - - - - - -
n = 10

F{t} = Sqrt[Xp{t}^2 + Yp{t}^2]
ln= Integ[F, {a, b, n, 2}]

'@Length = @ln, Units.!

