is equal to X Plus One by X 244
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AddictionBoy:
which paper is this
answer is 0?
is the ans 8?
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Given : 1/x + 1/y = 1/(x+y)
simplify,
(x + y)/xy = 1/(x+y)
(x + y)^2 = xy
x^2 + y^2 + 2xy = xy
or, x^2 + y^2 = -xy ------(1)
8x^3 - 8y^3 = 8 [ (x-y){ (x^2 + y^2) + xy} ]
= 8 [ (x+y){ -xy + xy}] from (1)
= 8 (x-y)(0)
= 0 ;)
simplify,
(x + y)/xy = 1/(x+y)
(x + y)^2 = xy
x^2 + y^2 + 2xy = xy
or, x^2 + y^2 = -xy ------(1)
8x^3 - 8y^3 = 8 [ (x-y){ (x^2 + y^2) + xy} ]
= 8 [ (x+y){ -xy + xy}] from (1)
= 8 (x-y)(0)
= 0 ;)
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