Question

if X =a-b by a + b ,y =b-c by b + c and z= c-a by c+ a find the value of 1 + X by 1 - X ,1 + y by 1 - yand 1 + Z by 1 -Z.
Please it's urgent... ​

Answer 1

Step-by-step explanation:

similarly you can prove this in case of y and z