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If Y is the mean proportional between X and Z prove that X Y + Y Z is the mean proportional between X square + Y square and y square + Z Square
HarshaTalluri:
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oh wait.. nvm i got it
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Since y is the mean proportion between x and z
Therefore, y^2 = xz
Now, we have to prove that xy + yz is the mean proportional between x^2 + y^2 and y^2 + z^2,
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