Question

( 1 / x³ + 1 / y ³) varigias 1/ x³+ y³
now prove that, x varigias y​

Answer 1

Answer:

Let x=ky then,

x

2

+y

2

=k

2

y

2

+y

2

=y

2

(k

2

+1)

x

2

−y

2

=k

2

y

2

−y

2

=y

2

(k

2

−1)

So

x

2

−y

2

x

2

+y

2

=

(k

2

−1)

(k

2

+1)

x

2

+y

2

=l(x

2

−y

2

) where l=

(k

2

−1)

(k

2

+1)

, a