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若x-y=1,化简:(x+y)(x2+y2)(x4+y4)(x8+y8)(x16+y16)
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若x-y=1,化简:(x+y)(x2+y2)(x4+y4)(x8+y8)(x16+y16)
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答案和解析
依题意得:(x+y)(x2+y2)(x4+y4)(x8+y8)(x16+y16),
=(x-y)(x+y)(x2+y2)(x4+y4)(x8+y8)(x16+y16),
=(x2-y2)(x2+y2)(x4+y4)(x8+y8)(x16+y16),
=(x4-y4)(x4+y4)(x8+y8)(x16+y16),
=(x8-y8)(x8+y8)(x16+y16),
=(x16-y16)(x16+y16),
=x32-y32.
=(x-y)(x+y)(x2+y2)(x4+y4)(x8+y8)(x16+y16),
=(x2-y2)(x2+y2)(x4+y4)(x8+y8)(x16+y16),
=(x4-y4)(x4+y4)(x8+y8)(x16+y16),
=(x8-y8)(x8+y8)(x16+y16),
=(x16-y16)(x16+y16),
=x32-y32.
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