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Devansh123 from D.S.B INTERNATIONAL PUBLIC SCHOOL, Rishikesh
Subject :IMO    Class : Class 8

When simplified, (x- 1 + y- 1)- 1 is equal to ____.

(A) x + y

(B)

(C) x y

(D)
i could not understand it. plz solve and inform by another method

Ans 1:

sai aashirwad from geethanjali vidyalaya, Bengaluru
Class : Class 8
((x^-1)+(y^-1))^-1=((1/x)+(1/y))^-1 =((x+y)/xy)^-1=xy/(x+y)

Ans 2:

Mayank from D. S. M. School for Excellence , Jamshedpur
Class : Class 8
a) x+y

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