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August 27th, 2016, 02:10 AM   #1
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how is this calculated??

Hi thanks in advance for any help here

ive been given this equation

$\frac{10}{1000}$ (1-$e^{\frac{12x10^-2}{6x10^-6}}$)

does it = 0.01(1-$e^{2000}$)

as everything I try comes out as , NaN
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August 27th, 2016, 02:56 AM   #2
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very nearly but not quite.

$\displaystyle \frac{{12x{{10}^{ - 2}}}}{{6x{{10}^{ - 6}}}} = \frac{{2x{{10}^{ - 2}}}}{{{{10}^{ - 4}}x{{10}^{ - 2}}}} = \frac{2}{{{{10}^{ - 4}}}} = 2x{10^4} = 20,000$

Note your lettering is very small and hard to read.

Please make it bigger next time.

Last edited by studiot; August 27th, 2016 at 02:58 AM.
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August 27th, 2016, 03:46 AM   #3
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Woops sorry I meant e^20,000 missed a zero

So is the answer simply

=0.01(1-e^20000)

Last edited by mathmere; August 27th, 2016 at 03:58 AM. Reason: Clarity
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August 27th, 2016, 05:09 AM   #4
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I don't know what the equation is since you have written an expression, not an equation.

An equation has an equals sign.

But yes, you have now correctly simplified the expression.

Please note the correct terminology for the future.
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