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Q 2:
If a+b+c = 0 prove that a^{2}/bc+ b^{2}/ca+ c^{2}/ab = 3
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Q 3: Answer:

Q 4: If a+b+c = 2S prove that a^{2}+b^{2} c^{2}+2ab/ a^{2}b^{2}+ c^{2}+2ac = (Sc)/(Sb)
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Q 5: If a+b+c 0 and a^{3}+b^{3}+c^{3} =3abc prove that a=b=c
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Q 7: If a+b+c = 0, prove that a^{3}+b^{3}+c^{3} = 3abc Answer:

Q 8: Prove that (x+y)(x+z) = x(x+z)+y(x+z)= x2+xz+xy+yz= x2+x(y+z)+yz Answer:

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