1.

Solve \[{{9}^{4x}}\div {{3}^{2x}}=2187\].

A.  \[x=\frac{6}{7}\]             
B.        \[x=\frac{-7}{6}\]
C.  \[x=\frac{7}{6}\]               
D.         \[x=\frac{-6}{7}\]
Answer» D.         \[x=\frac{-6}{7}\]


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