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Mathematics
Problem
For non–zero
a
a
a
, which of the following expressions is equal to
a
−
4
a^{-4}
a
−
4
? a)
a
4
a^{4}
a
4
b)
1
a
4
\dfrac{1}{a^{4}}
a
4
1
c)
a
−
1
4
a^{-\tfrac{1}{4}}
a
−
4
1
d)
1
a
−
4
\dfrac{1}{a^{-4}}
a
−
4
1
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