試試看,2011^2011=(2000+11)*(2000+11)*...(2000+11)=~11^2011,(因隻有這一項個位,十位,百位不為零.)=(10+1)(10+1)...(10+1)=~(2011*2010/2)*10*10*1^2009+2011*10*1^2010+1^2011=202123611.
2011*2011/2 是組合數,2011個東西,取倆個的取法數...,如3個東西A,B,C取2個有3*2/2個法,AB,AC,BC...,...
試試看,2011^2011=(2000+11)*(2000+11)*...(2000+11)=~11^2011,(因隻有這一項個位,十位,百位不為零.)=(10+1)(10+1)...(10+1)=~(2011*2010/2)*10*10*1^2009+2011*10*1^2010+1^2011=202123611.
2011*2011/2 是組合數,2011個東西,取倆個的取法數...,如3個東西A,B,C取2個有3*2/2個法,AB,AC,BC...,...
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