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ح1

һحһ1ح=-1 ,뼰ʱȷ,´λܰﵽŶ,ȷ,ҲԵõƸֵ,лл.

һحһ9ح +4 =-9+4 =-(9-4) =-5 ɰ

ݾֵĶ, x>0ʱ,|x|=x x=0ʱ,|x|=0 x<0ʱ,|x|=-x :x>0ʱ,|x|-1=x-1 x=0ʱ,|x|-1=0-1=-1 x<0ʱ,|x|-1=-x-1

Զձʻ̿

ǹ۲һֵ=1/2-1/3,ڶ=1/3-1/4,Կ1/3Լȥ,Դ,ԵóʣµIJּ:1/2-1/10=2/5

:|1/2|=1/2-|1/2|=-1/2=-0.5 ׷.ףѧϰ!

ح1/3-1/2ح+ح1/4-1/3ح+ح1/100-1/99ح=1/2-1/3+1/3-1/4+1/4-1/5+.+1/99-1/100=1/2-1/100=50/100-1/100=49/100

ح1-1/2ح+ح1/2-1/3/ح+|1/3-1/4|++|1/2013-1/2014l =1-1/2+1/2-1/3+1/3-1/4+1/2003-1/2004 =1-1/2004 =2003/2004

حa-3حʮحbһ2ح=0حbحһحaحֵ حa-3حʮحbһ2ح=0,a-3=0,b-2=0 a=3,b=2 حbحһحaح=ح2حһح3ح=2-3=-1

Ϊ-33,ǰ滹һž͵ڸ3

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