Solve exp-[(x-a)/b]dx

1. Jan 1, 2008

Rajini

hi

Hi i need to know the soln. for the following integral..

exp-[(x-a)/b]dx....a and b are some numbers...
thanks

2. Jan 1, 2008

waht

Solve it by substitution if u = (x-a)/b

3. Jan 1, 2008

Rajini

So answer would be -b exp[(a-x)/b] + C...
Is this correct!!!

4. Jan 1, 2008

slider142

This expression doesn't mesh with what you had up earlier. Do you have $e^\frac{x-a}{b}$ or $e^\frac{a-x}{b}$ ?

5. Jan 2, 2008

Rajini

hi

I have e[-(x-a)/b]...
the soln. is -b*e[(a-x)/b] + C
i.e., -b*e[-(x-a)/b] + C.
i think both the soln. are correct!

6. Jan 2, 2008

Gokul43201

Staff Emeritus

7. Jan 2, 2008

Rajini

one more

The soln. for a*exp[-(x-b)^2/(2c^2)] is...
a*sqrt(2c)exp[-(x-b)^2/(2c^2)].....
is this correct???

8. Jan 2, 2008

Gokul43201

Staff Emeritus
I don't think so. Indefinite Gaussian integrals do not have closed form expression.