Question

The equation e^-x - x +2 has one root a. Find an integer N such that N < a < N + 1

Answer 1

I have -e^-x -1 as the derivative but I'm having trouble solving for f(x) = 0

Answer 2

* f'(x)

Answer 3

all i can think of here is to use newtons method
http://en.wikipedia.org/wiki/Newton%27s_method

Answer 4

Thanks that's about the right direction.

Answer 5

yw:)