Posted by **Cleondra** on Sunday, February 19, 2012 at 11:50am.

f(x)=e^x-x

(a) at what x-values does f have relative extrema?

(b) find the exact value of -1 to 1 on an interval f(x)dx.

(c) show that f does not have any inflection points.

- calculus -
**Reiny**, Sunday, February 19, 2012 at 11:58am
f'(x) = e^x - 1

= 0 for extrema of the function

e^x = 1

x = 0

b) ??

c) for points of inflection, f''(x) = 0

f''(x) = e^x

e^x = 0

has no solution.

look at the graph of y = e^x, it never touches the x-axis

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