..................... а)
3х 4 6 ------- + -------- = ---------- х-1 х+1 х²-1 3х 4 6 ------- + -------- = ---------------- х-1 х+1 (х-1)(х+1) 3х(х+1)+4(х-1)-6=0 3х²+3х+4х-4-6=0 3х²+7х-10=0 D=49+120=169 √D=13 x₁=(-7+13)/6=1 x₂=(-7-13)/6= -20/6= -10/3 =-3 1/3
5+!