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May 8, 2011 at 9:10 comment added Maciej Skorski Is it true? We have $\frac{a}{a+b}f_0 + \frac{b}{a+b}f_1 = \frac{1}{x}+\frac{a^2}{a+b}x + \frac{b^2}{a+b}x^2$
Apr 18, 2011 at 8:41 history answered Denis Serre CC BY-SA 3.0