Question

please write fast answer​

Answer 1

Answer:

hi hmm do simplification

Answer 2

Step-by-step explanation:

$(\frac{7}{9} ) ^{4} \times ({ \frac{7}{9} })^{ - 10} = ( { \frac{9}{7} })^{ - 4} \times ({ \frac{7}{9} })^{2a - 1} \\ \\ = > ({ \frac{7}{9} })^{4} \times ( { \frac{7}{9} })^{ - 10} = ( \frac{1}{ \frac{9}{7} } ) ^{ - ( - 4)} \times ({ \frac{7}{9} })^{2a - 1} \\ \\ = > ({ \frac{7}{9} })^{4} \times ({ \frac{7}{9} })^{ - 10} = ({ \frac{7}{9} })^{4} \times ({ \frac{7}{9} })^{2a - 1} \\ \\ = > ({ \frac{7}{9} })^{4 + ( - 10)} = ({ \frac{7}{9} })^{4 + 2a - 1} \\ \\ = > ( { \frac{7}{9} })^{4 - 10} = ({ \frac{7}{9} })^{2a + 3} \\ \\ = > ({ \frac{7}{9} })^{ - 6} = ( { \frac{7}{9} })^{2a + 3} \\ \\ = > 2a + 3 = - 6 \\ \\ = > 2a = - 9 \\ \\ = > a = - \frac{9}{2} \\ \\ \\ \\ uing \: formula \: \: = \: \: \frac{1}{x} = {x}^{ - 1} \\ \\ \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \frac{1}{ {x}^{2} } = {x}^{ - 2} \\ \\ \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: {x}^{m} . {x}^{n} = {x}^{m + n}$