in my research work I am sticking with a equation like--

A1*exp(a*x)-A2*exp(-a*x)+A3*exp(-x/A)=0

solving for x

how should i proceed if i don want to solve it numerically..

I mean I need some expression for x. what may be the technique to follow.

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- June 12th 2011, 11:17 AMsheikhnirsolving an nonlinear exp equation
in my research work I am sticking with a equation like--

A1*exp(a*x)-A2*exp(-a*x)+A3*exp(-x/A)=0

solving for x

how should i proceed if i don want to solve it numerically..

I mean I need some expression for x. what may be the technique to follow. - June 12th 2011, 02:39 PMmr fantastic
- June 12th 2011, 02:46 PMpickslides
You could graph each term separately and find an approximate solution using an addition of ordinates, I don't see this one solved algebraically.

- June 13th 2011, 08:00 AMsheikhnir
well the equation actually has not have only one independent variable actually there are two..

let's see like this A1=f(y)

now,

A1*exp(a*x)-A2*exp(-a*x)+A3*exp(-x/A)=0

is it possible to solve like x=f(y)

like as below

if (y+1)exp(-a*x)=1

then x= -ln(1/(y+1))/a

Thanks to all for helping me to understand - June 13th 2011, 08:04 AMsheikhnir
actually we cant say it solve, find an expression for x.