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[" If "x,y,z" are in A.P.show that "(x+2...

[" If "x,y,z" are in A.P.show that "(x+2y-z)(2y+z-x)],[(z+x-y)=4xyz]

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Show that abs([y+z ,x,x],[y,z+x,y],[z,z,x+y])=4xyz

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