Mathematics
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OpenStudy (anonymous):
can anyone explain this to me:
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OpenStudy (anonymous):
\[\left[\begin{matrix}-3k ^{-3} & \times (mn)^{3} \\ p ^{-8} & \end{matrix}\right]\]
OpenStudy (anonymous):
x = times. not a variable :)
OpenStudy (anonymous):
what kind of explanation are you looking for? It's a matrix right?
OpenStudy (anonymous):
i don't think it's a matrix, we're working with exponents now.
OpenStudy (anonymous):
other ex we did in class:
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OpenStudy (anonymous):
\[6bc ^{0}\] = 6b
OpenStudy (anonymous):
Yea that is right but I don't see this thing you mentioned can be solved like that.
OpenStudy (anonymous):
we did another one, hold up. it's with fractions too
OpenStudy (anonymous):
\[5a ^{-4} / 2c\]
OpenStudy (anonymous):
= 5/2a^4c
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OpenStudy (anonymous):
Is there any fraction in the problem you mentioned
OpenStudy (anonymous):
yeah, the " /"
OpenStudy (anonymous):
So just move the variables with negative power from numerator to denominator and vice versa.
OpenStudy (anonymous):
how would u solve the problem above?
OpenStudy (anonymous):
I am assuming problem looks like this
-3k^-8 x (mn)^2 / p^-8
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OpenStudy (anonymous):
-3k^-3 x (mn)^3 / p^-8 :)
OpenStudy (anonymous):
those equation #'s are so small..
OpenStudy (anonymous):
Great. So it should be -3(mn)^3 x p^8 / k^3
OpenStudy (anonymous):
why?
OpenStudy (anonymous):
anything with a negative power is equivalent to its reciprocal with positive power.
so k^-3 will be 1/k^3
and
1/p^-8 will be p^-8
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OpenStudy (anonymous):
what about the -3 ?
OpenStudy (anonymous):
the first one* not the exponent
OpenStudy (anonymous):
It;s just a number with negative sign it stays where it is.
OpenStudy (anonymous):
You only have to look for the negative exponents.
OpenStudy (anonymous):
and (mn)^3 ?