Find the value of `( 8^-1 - 9^-1 )^-1 ÷ ( 4^-1 - 9^-1 )^-1`

Find the value of: ( -1/9 )^(-1/2 )

Find the value of ( -4/9 )^(-1 )

Find the value of (1/9)^(-1/2)

Find the value of (1/9+1/4^2+1/2^4)^0

Find the value of   3 5/9 - 1 1/6

Find the value of 1/(sqrt9 - sqrt4)

Find the value of 1 + 1/( 1 + 1/ ( 1 + 1/ 9 )   is

Find the value of 1/(sqrt(9) - sqrt(4)) .

Find the value of ( 1 5/9 ) times ( -3 3/8 ) ÷ ( - 7 times 3/4 ) is ( a ) 1/2 ( b ) -1/2 ( c ) 1 ( d ) -1

Find the value of A 1 A x A ------------- 9 A