Friday, July 12, 2013

SAT math Exponential

SAT math Exponential

I'd like to help me to the following sat math question

Find the value of , given that .

Answer
http://www.satmath4u.com/threads/54-SAT-math-exponential

First take a look to this revision notes about Exponents

http://www.ibmaths4u.com/Exponential...20function.pdf

Starting with  

square both sides  

and finally you get  

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