Question

lim

x→2

x2-3x+2

x2-4

的值等于______．

Answer 1

lim

x→2

x2-3x+2

x2-4

=

lim

x→2

(x-2)(x-1)

(x -2)(x+2)

=

lim

x→2

x-1

x+2

=

1

4

故答案为：

1

4