/ 2/5\ acos\x /
-2 -------------------- __________ 3/5 / 4/5 5*x *\/ 1 - x
/ 2 3 \ 2*|- -------- + ----| | 4/5 4/5| \ 1 - x x / --------------------- __________ 4/5 / 4/5 25*x *\/ 1 - x
/ 12 6 7 \ 4*|- ----- - ------------- + ---------------| | 13/5 2 9/5 / 4/5\| | x / 4/5\ x *\1 - x /| \ x*\1 - x / / --------------------------------------------- __________ / 4/5 125*\/ 1 - x