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Let \(a,b,c,d \) be real numbers such that \(\frac{(a - b)(c - d)}{(b - c)(d - a)} = \frac{2}{5}.\)
Find the sum of all possible values of \(\frac{(a - c)(b - d)}{(a - b)(c - d)}.\)

 Oct 19, 2019
 #1
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a=67,  b=11, c=4, d=7

 

For first expression =2 /5

 

For 2nd expression =651 / 11

 Oct 19, 2019

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