September 2018 1 98 Report
Jika \left(\begin{array}{ccc}a-b& &-b\\ & & \\0& &1\end{array}\right) ^{-1} = \left(\begin{array}{ccc}a& &1\\ & & \\-a+2b& &1\end{array}\right) ,nilai ab = ...

a.2
b.1
c.-3/5
d.-1
e.-2

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