若x-y=1 化简（x+y)(x^2+y^2)(x^4+y^4)(x^8+y^8)(x^16+y^16)

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（x+y)(x^2+y^2)(x^4+y^4)(x^8+y^8)(x^16+y^16)
＝1＊（x+y)(x^2+y^2)(x^4+y^4)(x^8+y^8)(x^16+y^16)
=(x-y)（x+y)(x^2+y^2)(x^4+y^4)(x^8+y^8)(x^16+y^16)
=x^32-y^32

（x+y)(x^2+y^2)(x^4+y^4)(x^8+y^8)(x^16+y^16)
=1×（x+y)(x^2+y^2)(x^4+y^4)(x^8+y^8)(x^16+y^16)
=(x-y)（x+y)(x^2+y^2)(x^4+y^4)(x^8+y^8)(x^16+y^16)
=(x^2-y^2)(x^2+y^2)(x^4+y^4)(x^8+y^8)(x^16...

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（x+y)(x^2+y^2)(x^4+y^4)(x^8+y^8)(x^16+y^16)
=1×（x+y)(x^2+y^2)(x^4+y^4)(x^8+y^8)(x^16+y^16)
=(x-y)（x+y)(x^2+y^2)(x^4+y^4)(x^8+y^8)(x^16+y^16)
=(x^2-y^2)(x^2+y^2)(x^4+y^4)(x^8+y^8)(x^16+y^16)
=(x^4-y^4)(x^4+y^4)(x^8+y^8)(x^16+y^16)
=(x^8-y^8)(x^8+y*8)(x^16-y^16)
=(x^16-y^16)(x^16+y^16)
=x^32-y^32

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（x+y)(x^2+y^2)(x^4+y^4)(x^8+y^8)(x^16+y^16)
=(x-y)（x+y)(x^2+y^2)(x^4+y^4)(x^8+y^8)(x^16+y^16)/(x-y)
=(x²-y²)(x^2+y^2)(x^4+y^4)(x^8+y^8)(x^16+y^16/（x-y)
=(x^4-y^4)(x^4+y^4)(x^8+y^8)(x^16+y^16/（x-y)
=(x^8-y^8)(x^8+y^8)(x^16+y^16/（x-y)
=(x^16-y^16)(x^16+y^16)/(x-y)
=x^32-y^32

4(x-0.2)=16.8 4x-0.8=16.8 4x=16.8 0.8=17.6 x=4.4 4x - 0.8 = 16.8 4x = 16.8 0.8 4x = 17.2 x = 4.3 ..

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