Find the derivative of e^x / sqrt(2)

1. Nov 20, 2007

surfhare75

I must be brain dead ,but I can not seem to compute the derivative of e^x/sqrt2

I am stuck when I used the quotient rule for derivatives

2. Nov 20, 2007

mrroboto

if you're problem is deriv of (e^x)/sqrt2 then try factoring out the sqrt2. If not the quotient rule is (F'G - FG')/(G^2)

3. Nov 20, 2007

HallsofIvy

Staff Emeritus
You don't have a "quotient"! You just have ex multiplied by a CONSTANT.

4. Nov 21, 2007

danni7070

d/dx e^x = e^x

d/dx sqrt(2) = 0

I don't know the english name for this rule but call e^x = u and sqrt(2) = v

d/dx u/v = (u'v-uv')/v^2

5. Nov 21, 2007

HallsofIvy

Staff Emeritus
That would be the "quotient rule" referred to before. However, you don't really need either the product rule or quotient rule when the other "function" is a constant!
If C is a constant, then (Cf(x))'= Cf '(x) and (f(x)/C)'= f'(x)/C. Most people learn those long before (well, maybe a week) before they learn the product rule or quotient rule.