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- Thread starter kuheli
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- Feb 21, 2013

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Hello,if b is the mean proportion between a and c ; prove that

(a^2 - b^2 + c^2) / (a^-2 - b^-2 + c^-2) = b^4

Do you got any progress?

do you know what they mean with "b is the mean proportion between a and c"

\(\displaystyle b^2=ac\) put that on left side what do you got?

Regards,

\(\displaystyle |\pi\rangle\)

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