# Deriving an equation

• Mar 29th 2010, 03:20 PM
Mashu
Deriving an equation
exp[m1t-m2t-m3t] mew-number bottom right-t

Since t is common to each, there must be a better way of writing that. I am using equation editor with word, which doesn't paste here. Any help gratefully received. http://physicsmathforums.com/images/smilies/smile.gif
• Mar 29th 2010, 05:26 PM
skeeter
Quote:

Originally Posted by Mashu
exp[m1t-m2t-m3t] mew-number bottom right-t

Since t is common to each, there must be a better way of writing that. I am using equation editor with word, which doesn't paste here. Any help gratefully received. http://physicsmathforums.com/images/smilies/smile.gif

is this the expression you mean to post?

$e^{\mu_1t - \mu_2t - \mu_3t}
$

... and what do you want done with it?
• Mar 30th 2010, 02:07 AM
HallsofIvy
I think you want $e^{-\mu_1t- \mu_2t- \mu_3t}= e^{-(\mu_1+\mu_2+\mu_3)t}$.

By the way, the standard English transliteration of the Greek letter $\mu$ is "mu", new "mew".