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learoy231
Apr 11, 2011, 05:05 AM
2^x+2 = 4^-x

how do I solve this?

thanks!

galactus
Apr 11, 2011, 05:29 AM
Do you mean 2^{x+2}=4^{-x}?

You have 2^{x}+2=4^{-x} written.

learoy231
Apr 11, 2011, 06:45 AM
Yes I wrote it wrong not to used to wrighting math on the PC

Thanks

Unknown008
Apr 11, 2011, 08:28 AM
Use the indices rule:

a^{x+y} = a^x\ .\ a^y

a^{-b} = \frac{1}{a^b}

a^{xy} = (a^x)^y

You might want to do a substitution to make things easier. Something like... y = 2^x