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Mathematics 20 Online
OpenStudy (lifeisadangerousgame):

What's 3+ 1?

OpenStudy (anonymous):

31

OpenStudy (anonymous):

tough one here, let me bust out the calculator

OpenStudy (lifeisadangerousgame):

Great now that I have your attention: What's (6^x+6^-x)/6 = 2?

OpenStudy (amistre64):

split the summation into 2 fracs

OpenStudy (amistre64):

then we get: \[6^{x-1}+6^{-x-1}=2\]

OpenStudy (amistre64):

or we could avoid that setup and go straight for the =12 bit :)

OpenStudy (amistre64):

like bases and compare exponents!! i recall that now

OpenStudy (lifeisadangerousgame):

Oohh, ok!

OpenStudy (amistre64):

almost had i good thought ... thissss close lol

OpenStudy (amistre64):

wolframalpha?

OpenStudy (lifeisadangerousgame):

oh yea! I could try that! Thanks

OpenStudy (amistre64):

http://www.wolframalpha.com/input/?i=%286%5Ex%2B6%5E-x%29%2F6-2%3D0 eeewwww!!!

OpenStudy (lifeisadangerousgame):

LOL

OpenStudy (lifeisadangerousgame):

Thanks a bunch :D

OpenStudy (amistre64):

yw :)

OpenStudy (anonymous):

didn't see the equal sign there, though he was just factoring it

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