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September 30, 2014

September 30, 2014

Posted by **jason** on Sunday, December 7, 2008 at 8:46pm.

x^(2/3)=(1/27)

(2^(x)+4)/(2^x)=2

explain please

- pre cal -
**Noether**, Sunday, December 7, 2008 at 8:53pmFor the first one, remember that (a^b)^c = a^(bc). 2/3 * 3/2 = 1, so raise each side to the power of 3/2. That's all you need to do; you'll be left with x=(something).

For the second, start by splitting the left side into two fractions, like so:

(2^x)/(2^x) + 4/(2^x) = 2.

(2^x)/(2^x) = 1, so we can subtract that from both sides:

4/(2^x) = 1.

Multiply by 2^x to get that to itself:

4 = 2^x.

And you should be able to finish it yourself.

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