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There likely isn't a closed-form solution that will lead you exactly to the answer. &nbsp;You'll need to do some kind of search like the one QCD recommends, or perhaps Newton's method.
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There likely isn't a closed-form solution that will lead you exactly to the answer.  You'll need to do some kind of search like the one QCD recommends, or perhaps Newton's method.

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Newton's method would require evaluating the derivative of the expression.
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Newton's method would require evaluating the derivative of the expression.

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That's true, but it would also provide much faster convergence. &nbsp;There is a tradeoff of implementation complexity and runtime.
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That's true, but it would also provide much faster convergence.  There is a tradeoff of implementation complexity and runtime.

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<div class="content wysiwyg-content">
Hi<br />
<br />
I want to solve for k in the following equation using matlab but have no clue how it can be done. i need help<br />
<br />
all the variables are known except k and beta is a vector<br />
sum is summation n = 1 to 10000<br />
<br />
P = Po/(1+l*h) + 2*h*Po*sum((exp(-k*beta(n)<wbr />^2*t/(phi*<wbr />uc))), n=1..10000)<br />
<br />
thanks
</div>
</div>


Hi

I want to solve for k in the following equation using matlab but have no clue how it can be done. i need help

all the variables are known except k and beta is a vector
sum is summation n = 1 to 10000

P = Po/(1+l*h) + 2*h*Po*sum((exp(-k*beta(n)^2*t/(phi*uc))), n=1..10000)

thanks

solving for an unknown inside a summation

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