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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