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    Forum moderator: dgk3593, khoapro 
    Forum » Học tập » Toán » giai giup (giai giup)
    giai giup
    ilovekid93Date: Saturday, 2008-10-04, 12:02 PM | Message # 1
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    1)tim x,y,z thuoc tap hop so nguyen sao cho x!*y!=z!
    2) tim x,y,z,n thuoc tap hop so nguyen sao cho thoa pt sau
    (5*10^n)x = 3 (yyy....z) (n-1 chu so y ) ( voi yyy...z la mot day so ( ko fai tich ) )
     
    dgk3593Date: Saturday, 2008-10-04, 3:37 PM | Message # 2
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    Group: Administrators
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    1)x thuộc N
    y=x! -1
    z=x!

    hay y thuộc N
    x=y! -1
    z=y!

    2) Đang giải

     
    ilovekid93Date: Tuesday, 2008-10-07, 12:52 PM | Message # 3
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    ban dgk3593 oi bai` 1 hinh nhu ban thieu nghiem oi` vi x=5 y=3 z=6 cung duoc ma` (5!*3! =1*2*3*4*5*6 = 6! ) ma`

    Added (2008-10-07, 12:52 Pm)
    ---------------------------------------------
    sr moi ng` cho di'nh chi'nh lai ba`i 2 la tim x,y,z,n thuoc tap hop so nguyen sao cho thoa pt sau
    ((5*10^n) -2)x = 3 (yyy....z) (n-1 chu so y ) ( voi yyy...z la mot day so ( ko fai tich ) )

     
    Forum » Học tập » Toán » giai giup (giai giup)
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