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kr1sty
Pe: 2008-10-10T06:14:30+03:00 In: In:

exercitiu de algebra cls 8 nu prea greu dar nu gasesc numit

astept rezolvarea pana azi in ora 11 40 va rog f. mult
a=5radik2 totu supra 22
b=-6radikl2 totu supra 55
c=7radikl2 totu supra 66
d=-7radikl2 totu supra 35
calculeaza : a-b
b-d
d-c
c-a
si apoi a=(a-b) + (b-d) + (d-c) + (c-a)
multumesc anticipat!!!

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3 raspunsuri

  1. dan
    expert (VI)

    kr1sty wrote: astept rezolvarea pana azi in ora 11 40 va rog f. mult
    a=5radik2 totu supra 22
    b=-6radikl2 totu supra 55
    c=7radikl2 totu supra 66
    d=-7radikl2 totu supra 35
    calculeaza : a-b
    b-d
    d-c
    c-a
    si apoi a=(a-b) + (b-d) + (d-c) + (c-a)
    multumesc anticipat!!!

    \rm{ a-b=\frac{5\sqrt2}{22}-\frac{6\sqrt2}{55}=\\ cm.m.m.c(22;55)=2 \cdot 5 \cdot {11} deci:\\ a-b=\frac{^{5)}5\sqrt2-^{2)}6\sqrt2}{110}= \\=\frac{13\sqrt2}{110};\\ la "b-d...cm.m.m.c(55;35)=\\ =[55;35]=5\cdot7\cdot11=385;\\ la "d-c"...[35;66]=2\cdot3\cdot5\cdot7\cdot11= 2310;\\ la "c-a"...[66;22]=66;
    De aici, sper sa te descurci…

  2. dan
    expert (VI)

    \rm{in loc de "a" probabil "A".......\\ A=(a-b) + (b-d) + (d-c) + (c-a) \Leftrightarrow\\ A=\not{a}-\not{b}+\not{b}-\not{d}+\not{d}-\\ -\not{c}+\not{c}-\not{a}=0.

  4. kr1sty

    iti multumesc dane pentru inceput mai ajutat f mult

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