From (i), f(x) has factors x, x+2 and x+4
From (ii), f(x) has x+1 in denominator
From (iii), f(x) has a minimum at x=-1, so the power of x+1 is even
From (iv), f(x) has a limit, so degrees...
有理函数的问题求大神帮忙分析讲解！明天考试！
From (i), f(x) has factors x, x+2 and x+4
From (ii), f(x) has x+1 in denominator
From (iii), f(x) has a minimum at x=-1, so the power of x+1 is even
From (iv), f(x) has a limit, so degrees...