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OpenStudy (anonymous):
please help me..
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OpenStudy (anonymous):
\[\left[\begin{matrix}a ^{-2}+2a ^{-1}b ^{-1}-3b ^{-2}& ? \\ a ^{-2}-b ^{-2} & ?\end{matrix}\right]\]
OpenStudy (anonymous):
is that discrete?
OpenStudy (perl):
is this a matrix?
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