1,a+b=3,(a+b)²=9a²+b²+2ab=9a²+b²+2(1/2)=9,[ab=½,]a²+b²=8(a²+b²)²=8²a^4+b^4+2a²b²=64a^4+b^4+2(ab)²=64a^4+b^4+2(1/2)²=64,[ab=½,]a^4+b^4=127/22,a分之b+b分之a=b/a+a/b=(b²+a²)/(ab)=8/(1/2),[a²+b²=8,ab=½,]=16