(1+1/2)*(1+1/4)*(1+1/16)*(1+1/256)=?
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原式=(1-1/2)(1+1/2)(1+1/4)(1+1/16)(1+1/256)/(1-1/2)
=(1-1/4)(1+1/4)(1+1/16)(1+1/256)/(1-1/2)
=(1-1/16)(1+1/16)(1+1/256)/(1-1/2)
=(1-1/256)(1+1/256)/(1-1/2)
=(1-1/65536)/(1/2)
=65535/65536×2
=65535/32768
=(1-1/4)(1+1/4)(1+1/16)(1+1/256)/(1-1/2)
=(1-1/16)(1+1/16)(1+1/256)/(1-1/2)
=(1-1/256)(1+1/256)/(1-1/2)
=(1-1/65536)/(1/2)
=65535/65536×2
=65535/32768
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展开全部
(1+1/2)*(1+1/4)*(1+1/16)*(1+1/256)
=(1-1/2)*[(1+1/2)*(1+1/4)*(1+1/16)*(1+1/256)]/(1-1/2)
=(1-1/4)*(1+1/4)*(1+1/16)*(1+1/256)/(1/2)
=2*(1-1/16)*(1+1/16)*(1+1/256)
=2*(1-1/256)*(1+1/256)
=2*(1-1/256^2)
=2*65535/65536
=65535/32768
=(1-1/2)*[(1+1/2)*(1+1/4)*(1+1/16)*(1+1/256)]/(1-1/2)
=(1-1/4)*(1+1/4)*(1+1/16)*(1+1/256)/(1/2)
=2*(1-1/16)*(1+1/16)*(1+1/256)
=2*(1-1/256)*(1+1/256)
=2*(1-1/256^2)
=2*65535/65536
=65535/32768
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