Question

If (x+y) z = 1 then z is a multiplicative inverse

Answer 1

z is multiplicative inverse of
$\frac{1}{(x + y)}$

Answer 2

Answer:

X+y=-1

Cubing on both sides

So

(X+y)³=-1³

X³+y³+3xy(x+y)=-1

X³+y³+3xy(-1)=-1

X³+y³-3xy=(-1)

X³+y³-3xy=-1

Ur answer is here.....!!!!!

Plz Mark as brainliest....!!!!