1.

 Simplify and write in the form of \(\frac {a^m}{a^n} = a^{m-n} \,or\, \frac {a^m}{a^n} = \frac {1}{a^{n-m}}\) : \(\frac {(-9)^{11}}{(-9)^7}\)

Answer»

\(\frac {(-9)^{11}}{(-9)^7}\) = (-9)11-7 = (-9)4



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