若a2−4a+1+1-4b+4b2=0,则a2+1a2+b=()A.12B.14.5C.16D.6+23 答案网 2020-02-10 阅读(11) 若a2−4a+1+1-4b+4b2=0,则a2+1a2+b=()A.12B.14.5C.16D.6+23 问题描述:若a2−4a+1+1-4b+4b2=0,则a2+1a2+b=( )A. 12B. 14.5C. 16D. 6+23最佳答案: ∵a2−4a+1+1-4b+4b2=0∴a2-4a+1=0,1-4b+4b2=0,∴a+1a=4,a2+1a2=14;b=12;∴a2+1a2+b=14+12=14.5.故选:B.