Question

Differentiate the function y = f(x) = x+1 divided by
x−1. there are no parentheses if it matters. my answer was -2 divided by x squared - 2x + 1. ( pretty sure i missed it)

Answer 1

http://www.wolframalpha.com/input/?i=differentiate+%28+x%2B+1%29%2F+%28x-1%29

Answer 2

f(x) = u/v
u = (x+1)
v = (x-1)
maybe you used the formula :
f'(x) = (u'v - v'u)/(v^2)
so lets calculate it :
u' = 1
v' = 1
so u'v = 1*(x-1)
v'u = 1*(x+1)
v^2 = (x-1)^2
u'v - v'u = x-1 -(x+1) = -2
put all together :
f'(x) = -2/((x-1)^2)

Answer 3

so i was correct.

Answer 4

yes :) now ive noticed lol
i could spare time :|