Question

URGENTE....AYUDA PORFA......​

Answer 1

Respuesta:

$9^{-7} .9^{11} = 9^{-7+11} =9^{4} = (3^{2} )^{4} = 3^{8} \\\\4^{6} :8^{-3} = (2^{2} )^{6} :(2^{3} )^{-3} = 2^{12} :2^{-9} = 2^{12 - (-9)} = 2^{12+9} = 2^{21} \\\\(25^{9} )^{-3} = 25^{-27} = (5^{2} )^{-27} = 5^{-54} = \frac{1}{5^{+54} }$

Explicación paso a paso: