Exponential functions help

• Nov 1st 2009, 01:35 PM
perryman
Exponential functions help
1) Find the coordinates of any stationary point on the curve y = x - e^(x-1)

i got (-1, -1-e^-2) as being one point is that right?

2)
fine the range of values for which the function f(x) = 2x + e^(1-2x) is increasing

if you could help me with either that would be great, thanks
• Nov 1st 2009, 02:23 PM
skeeter
Quote:

Originally Posted by perryman
1) Find the coordinates of any stationary point on the curve y = x - e^(x-1)

i got (-1, -1-e^-2) as being one point is that right?

no

2)
fine the range of values for which the function f(x) = 2x + e^(1-2x) is increasing

determine the interval(s) of x where f'(x) > 0

...
• Nov 2nd 2009, 12:47 AM
perryman
Quote:

Originally Posted by skeeter
determine the interval(s) of x where f'(x) > 0

HOW!?!?!
• Nov 2nd 2009, 01:34 AM
mr fantastic
Quote:

Originally Posted by perryman
HOW!?!?!

First get the derivative. Can you do that? (See here for the approach: http://www.mathhelpforum.com/math-he...ions-help.html). Please show all your working.