Question

Verify that (x + y)-1 # x-1 + y-1 by taking x =4/9 and -3/5.​

Answer 1

Answer:

firstly solve (x+y) - 1

put the value

{(5/9)+(-4/3)} - 1

(5/9-4/3)-1

LCM=9

(5/9-12/9)-1

-7/9-1=-7/9-9/9=-16/9

then solve x-1 + y-1

(5/9-1)+(-4/3-1)

(5/9-9/9)+(-4/3-3/3)

(-4/9)+(-7/3)

-4/9-21/9

-17/9

-16/9 is not equal to -17/9

Hence proved