Equazioni letterali; tipi e risoluzioni

indexUn’equazione si dice letterale se compare un parametro, cioè una lettera diversa dall’incognita. Per esse ci sono quattro metodi di risoluzione diversi a seconda del tipo:

– 1. letterale intera, senza il parametro al denominatore                                                                                                                                                                   – 2. letterale intera, con il parametro al denominatore                                                                                                                                                                       – 3. letterale fratta, senza il parametro al denominatore                                                                                                                                                                     – 4. letterale fratta, con il parametro al denominatore

Esempi

1.      5ax+4a=3x+4        si applica il 2° principio di equivalenza                                                                                                                                                           5ax-3x=4-4a          si arriva alla FORMA NORMALE ( Ax=B )                                                                                                                                                    (5a-3)x=4-4a         si esegue la discussione                                                                                                                                                                                            se a=3/5 allora 0x=8/5    l’equazione in questo caso è impossibile                                                                                                                                          se a≠3/5 allora x=(4-4a)/(5a-3)

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67 thoughts on “Equazioni letterali; tipi e risoluzioni

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