Question

已知实数x满足4x²-4x+1=0，则代数式2x+

1

2x

的值为______．

Answer 1

由已知得，（2x-1）²=0，解得x=

1

2

．
将其代入代数式得，原式=2×

1

2

+

1

2× 1 2

=1+1=2．