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ICSE Class X Math 2017 Paper

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SECTION A (40 Marks)
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Question : 1 of 31
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If bb is the mean proportion between aa and cc, show that:
  a4+a2b2+b4b4+b2c2+c4=  a2c2\;\frac{a^4+a^2 b^2+b^4}{b^4+b^2 c^2+c^4}=\;\frac{a^2}{c^2}
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