Saturday, May 16, 2015

Apply the laws of exponents to simplify the following: 3^3n / (27)^2nShow complete solution to explain the answer.

the laws of exponentials state that when SAME-based
exponentials divide, the exponentials subtract each other. In math
notation


X^A-X^B=X^(A-B)


well,
in this case, we still do not see a common base. However, we know that 27 =
3^3


so the denominator (27)^2n=
(3^3)^2n


by law of exponentials, a exponent's exponent
result in the exponents timed
together


(3^3)^2n=3^6n


the
original equation becomes:


3^3n/3^6n which using the
exponential law of division


= 3^(3n-6n)= 3 ^
(-3n)


well if your teacher allows you to write in negative
exponents, ust keep the answer, if not, continue
simplify:


by the law of mutiplying exponents
again


3^(-3n)=
(3^3)^-n=27^(-n)


by the law of negative
exponents


27^(-n)=1/(27^n)


Well,
you could also change the numerator 3^3n into 27^n first so that the base is both 27, do
whatever you think is easier.


Hope this
helps

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