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A + B + C

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by shashank.ism » Mon Feb 08, 2010 9:15 am
If a+b+c = 0.The value of (a^4+b^4+c^4)/(b^2c^2+c^2a^2+a^2b^2) is

a) 2
b) 3
c) 6
d) 8
e) 16
Last edited by shashank.ism on Mon Feb 08, 2010 10:06 am, edited 2 times in total.
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by sumanr84 » Mon Feb 08, 2010 9:35 am
IMO : A

I don't know the exact approach but I wud rather take substitution method,

Given, a+b+c = 0, I wud subst a = -1, b=0 and c=1

Solving we get 2

also, if we subst a=-2, b =1 and c=1

we get 2

hence, ans is option A
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by sars72 » Mon Feb 08, 2010 9:40 am
shashank.ism wrote:If a+b+c = 0.The value of a4+b4+c4/b2c2+c2a2+a2b2 is

a) 2
b) 3
c) 6
d) 8
e) 16
is it a4+b4+c4/b2c2+c2a2+a2b2 OR (a4+b4+c4)/(b2c2+c2a2+a2b2) ??
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