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Who do read my FLT 's solve?

Updated: 8/20/2019
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12y ago

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Địng lý cuối của PIERRE DE FERMAT.

(x,y,z,n) thuộc tập hợp ( N+ )^4..

n>2.

(a) thuộc tập hợp Z

F là hàm số của ( a.)

F(a)=[a(a+1)/2]^2

F(0)=0 и F(-1)=0.

Xét hai phương trình

F(z)=F(x)+F(y)

F(z-1)=F(x-1)+F(y-1)

Ta có một dãy suy luận

F(z)=F(x)+F(y) tương đương F(z-1)=F(x-1)+F(y-1)

F(z)=F(x)+F(y) suy ra F(z-1)=F(x-1)+F(y-1)

F(z-x-1)=F(x-x-1)+F(y-x-1) suy ra F(z-x-2)=F(x-x-2)+F(y-x-2)

ta có

F(z-x-1)=F(x-x-1)+F(y-x-1 )

F(z-x-1)=F(-1)+F(y-x-1 )

F(z-x-1)=0+F(y-x-1 )

cho

z=y

F(z-x-2)=F(x-x-2)+F(y-x-2)

F(z-x-2)=F(-2)+F(y-x-2)

F(z-x-2)=1+F(y-x-2)

cho

z=/=y.

do đó

F(z-x-1)=F(x-x-1)+F(y-x-1) không suy raF(z-x-2)=F(x-x-2)+F(y-x-2)

do đó

F(z)=F(x)+F(y) không suy ra F(z-1)=F(x-1)+F(y-1)

do đó

F(z)=F(x)+F(y) không tương đương F(z-1)=F(x-1)+F(y-1)

điều có thể xảy ra

[F(x)+F(y)] = F(z) и F(x-1)+F(y-1)]=/=F(z-1)

hay ngược lại

[F(x)+F(y)]-[F(x-1)+F(y-1)]=/=F(z)-F(z-1).

hoặc

F(x)-F(x-1)+F(y)-F(y-1)=/=F(z)-F(z-1).

ta có

F(x)-F(x-1) =[x(x+1)/2]^2 - [(x-1)x/2]^2.

=(x^4+2x^3+x^2/4) - (x^4-2x^3+x^2/4).

=x^3.

F(y)-F(y-1) =y^3.

F(z)-F(z-1) =z^3.

do đó

x^3+y^3=/=z^3.

n>2.tương tự

Ta có một dãy suy luận

F(z)=G(x)*F(x)+G(y)*F(y) tương đương G(z)*F(z-1)=G(x)*F(x-1)+G(y)*F(y-1)

G(z)*F(z)=G(x)*F(x)+G(y)*F(y) suy ra G(z)*F(z-1)=G(x)*F(x-1)+G(y)*F(y-1)

G(z)*F(z-x-1)=G(x)*F(x-x-1)+G(y-x-1)*F(y) suy ra G(z)*F(z-x-2)=G(x)*F(x-x-2)+G(y)*F(y-x-2)

ta có

G(z)*F(z-x-1)=G(x)*F(x-x-1)+G(y)*F(y-x-1 )

G(z)*F(z-x-1)=G(x)*F(-1)+G(y)*F(y-x-1 )

G(z)*F(z-x-1)=0+G(y)*F(y-x-1 )

cho

z=y.

G(z)*F(z-x-2)=G(x)*F(x-x-2)+G(y)*F(y-x-2)

G(z)*F(z-x-2)=G(x)*F(-2)+G(y)*F(y-x-2)

G(z)*F(z-x-2)=G(x)+G(y)*F(y-x-2)

x>0 do đó G(x)>0.

cho

z=/=y.

do đó

G(z)*F(z-x-1)=G(x)*F(x-x-1)+G(y-x-1)*F(y)не выводить G(z)*F(z-x-2)=G(x)*F(x-x-2)+G(y)*F(y-x-2)

do đó

G(z)*F(z)=G(x)*F(x)+G(y)*F(y) не выводить G(z)*F(z-1)=G(x)*F(x-1)+G(y)*F(y-1)

do đó

G(z)*F(z)=G(x)*F(x)+G(y)*F(y) не эквивалентен G(z)*F(z-1)=G(x)*F(x-1)+G(y)*F(y-1)

điều có thể xảy ra

[G(x)*F(x)+G(y)*F(y)]=G(z)*F(z) и [ G(x)*F(x-1)+G(y)*F(y-1)]=/=G(z-1)*F(z-1)

hay ngược lại

do đó

[G(x)*F(x)+G(y)*F(y)] - [ G(x)*F(x-1)+G(y)*F(y-1)]=/=G(z)*[F(z)-F(z-1)].

hay

G(x)*[F(x) - F(x-1)] + G(y)*[F(y)-F(y-1)]=/=G(z)*[F(z)-F(z-1).]

ta có

x^n=G(x)*[F(x)-F(x-1) ]

y^n=G(y)*[F(y)-F(y-1) ]

z^n=G(z)*[F(z)-F(z-1) ]

do đó

x^n+y^n=/=z^n

Hòa Bình.

Trần Tấn Cường.

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12y ago
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