Question

{(4/3)-¹ - (1/4 ) -¹} -¹​

Answer 1

(4/3)-¹ - (1/4 ) -¹} -¹

= { (3/4) - (4) } ^-1

= { (3-16)/4 }^-1

= (-13/4)^-1

= - 4/13 (ans.)