Calcula el valor de E:
E = 1 x 2 + 2 x 3 + 3 x 4 + … + 19 x 20
E = 1 x 2 + 2 x 3 + 3 x 4 + … + 19 x 20
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Respuesta:
4+20+19por20=400
Explicación paso a paso:
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