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elly00
.consigliere.

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[eserizio] altro esercizio sui moduli

Avendo:

1+x^2/2>|x+3|/2
come si deve procede a valutare la disequazione?

GRAZIE

26-04-2006 08:20
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Francesko
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dunque... è così giusto?

1+(x^2)/2>|x+3|/2

io l'ho fatta diventare così:

|x+3|<2+x^2

ho fatto i due sistemi, ho trovato le soluzioni e alla fine mi viene

primo sistema:
x>=3
x<(-1-radq(5))/2 AND x>(-1+radq(5))/2

secondo:
nessun x app. ad R

quindi la soluzione finale è: -3<=x<(-1-radq(5))/2

però è un po' strana come soluzione, mi sa tanto che è sbagliata... :?
sono proprio una capra...

26-04-2006 10:57
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poi_1969
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Per il secondo sistema va bene.

Per il primo mi viene (-3,(1-radq(5))/2) unito a ((1+radq(5))/2, + infinito)

ciao

26-04-2006 11:42
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