Question

prove that
8 - 1 plz fast

Answer 1

(x+y)^-1=1/(x+y)

1/(x+y)×(1/x+1/y)

1/(x+y)+(x+y/xy)

cancel (x+y) and u'll get 1/xy

Answer 2

(1/x+y)(1/x+1/y)
1/x+y ×(y+x)/xy
x+y/xy(x+y)
1/xy
proved