Question

please answer my question fast
I will mark you as brainlist​

Answer 1

Step-by-step explanation:

putting the values given in the equation

taking LHS

( -2/7 - 4/7 )^-1

=> ( -6/7 )^-1 = -7/6

now taking RHS

x^-1 - y^-1

-7/2 - 7/4

=> -21/4

therefore LHS ≠ RHS

hence proved