Question

Найдите значение выражения

Answer 1

$frac{2b}{b+c} + frac{b^2-bc}{2b} / frac{b^2 -c^2}{4c} = frac{2b}{b+c} + frac{b(b-c)}{2b} * frac{4c}{b^2 -c^2} = frac{2b}{b+c} + frac{b(2c)}{b+c} = frac{2b+2c)}{b+c} = frac{2(b+c))}{b+c} = 2$