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Three variable x,y,z such that y+z-x is ...

Three variable x,y,z such that y+z-x is a constant and if (z+x-y)(x+y-z) `alpha` yz, then show that `(x+y+z) alpha yz`.

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UNITED BOOK HOUSE-RAMAKRISHNA MISSION VIDYALAYA, NARENDRAPUR-EXERCISE
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