The value of (2 ⁻¹ 1 5 - 4 ) is

Step-by-step solution

aligned & 2 ⁻¹ ( 1 5 )= ⁻¹ [ 2 1 5 1- ( 1 5 )^2 ] & = ⁻¹ [ 10 24 ] & = ⁻¹ ( 5 12 ) & Let (2 ⁻¹ 1 5 - 4 )= x & [ ⁻¹ ( 5 12 )- 4 ]= x & ⁻¹ ( 5 12 )- 4 = ⁻¹ x & ⁻¹ ( 5 12 )- ⁻¹(1)= ⁻¹ x & ⁻¹ [ ( 5 12 -1 ) 1+ ( 5 12 )(1) ]= ⁻¹ x & x = -7 / 12 17 / 12 =-7 / 17 aligned