Question: 4. Soit f une fonction continue sur [a, b] et g une fonction continue sur [c, d]. Si on designe R = [a, b] x

4. Soit f une fonction continue sur [a, b] et g une fonction continue sur [c, d]. Si on designe R = [a, b] x [c, d], montrez que (f(x)g(y)) dA = f(x) dx) g (y) dy ) . R a c

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