Oct 29, 2013 Thread starter #1 K kuheli New member Oct 27, 2013 14 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
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
Oct 29, 2013 #2 Petrus Well-known member Feb 21, 2013 739 Re: please help with this fraction problem kuheli said: 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 Click to expand... Hello, Do you got any progress? do you know what they mean with "b is the mean proportion between a and c" Spoiler \(\displaystyle b^2=ac\) put that on left side what do you got? Regards, \(\displaystyle |\pi\rangle\)
Re: please help with this fraction problem kuheli said: 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 Click to expand... Hello, Do you got any progress? do you know what they mean with "b is the mean proportion between a and c" Spoiler \(\displaystyle b^2=ac\) put that on left side what do you got? Regards, \(\displaystyle |\pi\rangle\)