Thursday, January 29, 2015

What is x if log2 (3+log3(x))=2? 2,3 are bases of logarithms

If log 2 (3+ log 3 (x))=
2


then it means that 2^2=(3+log 3
x)


2^2 =4


4=3+log 3
(x)


Subtract three to both
sides


1= log 3 (x)


using the
definition of logs again


3^1 =
x


x= 3


The only
value accepted was a solution to this eqaution is
x=3


 


Actually,
log just mean the opposite of exponents, so when you take off a log a where a as the
base, exponent the other side with "a".


You can checkyour
answer by plugging it in and see if it matches the definition of
logs

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