(2+1)(2^2+1)(2^4+1)…(2^32+1)+1的值 上面的方法你掌握的吗? (1+0.5)(1+0.25)(1+1/16)(1+1/256 5
(2+1)(2^2+1)(2^4+1)…(2^32+1)+1的值上面的方法你掌握的吗?(1+0.5)(1+0.25)(1+1/16)(1+1/256)...
(2+1)(2^2+1)(2^4+1)…(2^32+1)+1的值 上面的方法你掌握的吗? (1+0.5)(1+0.25)(1+1/16)(1+1/256)
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(2+1)(2^2+1)(2^4+1)…(2^32+1)+1
=2^64-1+1
=2^64
(1+0.5)(1+0.25)(1+1/16)(1+1/256)
=(1-0.5)(1+0.5)(1+0.25)(1+1/16)(1+1/256)/(1-0.5)
=(1-0.25)(1+0.25)(1+1/16)(1+1/256)×2
=(1-1/16)(1+1/16)(1+1/256)×2
=(1-1/256)(1+1/256)×2
=(1-1/65536)×2
=2-1/32768
=1又32767/32768
=2^64-1+1
=2^64
(1+0.5)(1+0.25)(1+1/16)(1+1/256)
=(1-0.5)(1+0.5)(1+0.25)(1+1/16)(1+1/256)/(1-0.5)
=(1-0.25)(1+0.25)(1+1/16)(1+1/256)×2
=(1-1/16)(1+1/16)(1+1/256)×2
=(1-1/256)(1+1/256)×2
=(1-1/65536)×2
=2-1/32768
=1又32767/32768
追问
写清楚好么?
追答
(2+1)(2^2+1)(2^4+1)…(2^32+1)+1
=(2-1)(2+1)(2^2+1)(2^4+1)…(2^32+1)+1
=(2^2-1)(2^2+1)(2^4+1)…(2^32+1)+1
=(2^4-1)(2^4+1)…(2^32+1)+1
=(2^8-1)…(2^32+1)+1
………………………
=2^64-1+1
=2^64
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(2+1)(2^2+1)(2^4+1)……(2^32+1)+1
=(2-1)(2+1)(2^2+1)(2^4+1)……(2^32+1)+1
=﹙2²-1)(2^2+1)(2^4+1)……(2^32+1)+1
=﹙2^4-1)(2^4+1)……(2^32+1)+1
=······
=(2^32-1)(2^32+1)+1
=2^64-1+1
=2^64
(1+0.5)(1+0.25)(1+1/16)(1+1/256)
=2*(1-0.5)(1+0.5)(1+0.25)(1+1/16)(1+1/256)
=2*(1-0.25)(1+0.25)(1+1/16)(1+1/256)
=……
=2-1/2^15
=(2-1)(2+1)(2^2+1)(2^4+1)……(2^32+1)+1
=﹙2²-1)(2^2+1)(2^4+1)……(2^32+1)+1
=﹙2^4-1)(2^4+1)……(2^32+1)+1
=······
=(2^32-1)(2^32+1)+1
=2^64-1+1
=2^64
(1+0.5)(1+0.25)(1+1/16)(1+1/256)
=2*(1-0.5)(1+0.5)(1+0.25)(1+1/16)(1+1/256)
=2*(1-0.25)(1+0.25)(1+1/16)(1+1/256)
=……
=2-1/2^15
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