Question

化簡

x • 3 x2

x• 6 x

的結(jié)果是（　�。�

A． x

B．x

C．1

D．x2

Answer 1

x • 3 x2

x• 6 x

=

x 1 2 •x 2 3

x•x 1 6

=x

1

2

+

2

3

-1-

1

6

=x⁰
=1．
故選C．