Question

solve it...............

Answer 1

check this one if you wish

Answer 2

(d) -1/2
${ \frac{5}{9} }^{ 4} \times { \frac{5}{9} }^{ - 10} = { \frac{5}{9} }^{ - 4} \times { \frac{5}{9} }^{ 2a - 1}$
${ \frac{5}{9} }^{ - 6} = { \frac{5}{9} }^{ - 5 + 2a}$
Equating the exponents, as bases are same.
$- 6 = - 5 + 2a$
$\frac{ - 1}{2} = a$