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Mathematics 13 Online
OpenStudy (anonymous):

An exponent raised to another exponent...whoa, find the domain

OpenStudy (anonymous):

\[f(x)=\frac{ 1-e^x^2 }{ 1-e^1-x^2 }\]

OpenStudy (anonymous):

f(x)=(1-e^x^2)/(1-e^1-x^2)

OpenStudy (anonymous):

the denominator cant be zero

OpenStudy (anonymous):

What is your numerator by the way?? What is the power of e there ??

OpenStudy (anonymous):

one minus e to the power of x squared

OpenStudy (anonymous):

\[\large f(x) = \frac{1 - e^{x^2}}{1- e^1 - x^2}\] Right ??

OpenStudy (anonymous):

ya except the bottom is 1-e^(1-x^2)

OpenStudy (anonymous):

\[\large f(x) = \frac{1 - e^{x^2}}{1- e^{1 - x^2}}\] Now ??

OpenStudy (anonymous):

yup perfect

OpenStudy (anonymous):

So, you know denominator can't be 0..

OpenStudy (anonymous):

ya how do i solve this tho

OpenStudy (anonymous):

do i have to use log

OpenStudy (anonymous):

\[1 - e^{1-x^2} \ne 0 \implies e^{1-x^2} \ne 1\]

OpenStudy (anonymous):

i hate u

OpenStudy (anonymous):

You must.. I hate you too.. Because I don't like boys.. I like Girls.. Ha ha ha...

OpenStudy (anonymous):

i dont know how i didnt see that i wanted to solve it somehow

OpenStudy (anonymous):

thanks for your help as always

OpenStudy (anonymous):

If \(x^2 = 1\) Then : \[e^{1-1} = e^0 = 1\] But we don't need it is equal to 1.. So \(x^2 \ne 1\)

OpenStudy (anonymous):

ya i see that now :-)

OpenStudy (anonymous):

Got or not ?? Or need more explanation??

OpenStudy (anonymous):

\[x \ne \pm 1\]

OpenStudy (anonymous):

You can use ln here if you want: \[(1-x^2) \ln(e) \ne \ln(1) \implies 1 - x^2 \ne 0 \implies x^2 \ne 1\]

OpenStudy (anonymous):

thats perfect water, thats the way i was originally thinking of it but im rusty with logs

OpenStudy (anonymous):

Thanks..

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