n的n次方等于2,那么n等于多少答:n^n=2,取对数得nlnn=ln2,设f(n)=nlnn-ln2,f(1.5)=-0.0849,f(1.6)=0.0588,f(1.56)=0.000562 f(1.559)=-0.000881,f(1.5596)=-0.0000151,f(1.5597)=0.000129,f(1.55961)=-0.000000678,f(1.559611)=0.000000766 f(1.5596105)=0.000000044,f(1.5596104)=-0.0000001...