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maryiinush
Pe: 2013-11-14T17:06:06+02:00 In: In:

urgent pt maine

81^5/3^19+31^10*31^4/31^13+156-792/72+[(15^6)^4/3^23]/5^22=
eu am facut asa:
=3^20/3^19+31^14/31^13+156-11+(15^24/3^23)/5^22=
=3+31+156-11+
si aici m-am blocat. rezultatul trebuie sa fie 254 dar ce e de la paranteza incolo nu stiu cum sa rezolv ca sa imi dea 75

multumesc anticipat

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  1. aurel5
    maestru (V)

    maryiinush wrote: 81^5/3^19+31^10*31^4/31^13+156-792/72+[(15^6)^4/3^23]/5^22=
    eu am facut asa:
    =3^20/3^19+31^14/31^13+156-11+(15^24/3^23)/5^22=
    =3+31+156-11+
    si aici m-am blocat. rezultatul trebuie sa fie 254

    \it{\bl (15^{24}/3^{23})/5^{22}= (3\cdot5)^{24} : 3^{23} : 5^{22} = 3^{24}\cdot5^{24} : 3^{23} : 5^{22} = 3\cdot5^2 = 75.}

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