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algebra (Discussion)

rupali_varshney said – Tue, 06 Oct 2009 07:21:50 -0000 ( Link )

wat is the maximum value of a+b+c+d if a=b+c,b=c+d,c=d+a and a,b,c,d are positive integers??

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  1. vampiresid said – Mon, 19 Oct 2009 14:33:04 -0000 ( Link )

    ans should be a+c as b+d is turning out to be zero

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  2. piyushdawani said – Thu, 22 Oct 2009 05:38:56 -0000 ( Link )

    a=b+c…......(1) b=c+d…......(2) c=d+a…......(3)

    so, a+b+c=b+2c+2d+a c=-2d

    adding 1 and 3 we get b=-d

    so a=-3d

    so a+b+c+d =-3d-d-2d+d= -5d

    and d is +ve no. so max value is 0 when d is zero

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