Question

（青海）计算

2

3 +1

=

 

．

Answer 1

分析：根据二次根式的乘除法法则，分母有理化．

解答：解：

2

3 +1

=

2( 3 -1)

3-1

=

3

-1．

点评：主要考查了二次根式的乘除法运算．二次根式的运算法则：乘法法则

a

•

b

=

ab

．除法法则

b a

=

b

a

．