题目修改下!a2+b2-a-6b+37/4=0(a-1/2)^2+(b-3)^2=0a=1/2,b=3已知a+1/a=3,求a2+1/a2和(a-1/a)2的值a2+1/a2=(a+1/a)^2-2=7.(a-1/a)2=a2+1/a2-2=7-2=5