If = 1 2 and = 1 3 , then what is the value of ( + ) ?

Step-by-step solution

= 1 2 aligned & = 1 3 & ( + )= + 1- & = 1 2 + 1 3 1- ( 1 2 ) ( 1 3 ) = 5 6 5 6 =1 & + = ⁻¹(1)= 4 aligned