Bonjour,
B = [1/(1+a/b)] + [1 / (1+b/a)] = [1/((b+a)/b)] + [1/((b+a)/a)] = b/(a+b) + a/(a+b) = (a+b)/(a+b) = 1.
Bonne journée.
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Bonjour,
B = [1/(1+a/b)] + [1 / (1+b/a)] = [1/((b+a)/b)] + [1/((b+a)/a)] = b/(a+b) + a/(a+b) = (a+b)/(a+b) = 1.
Bonne journée.