Question

化簡

3	a

•

a

的結(jié)果是（　�。�

• A．

  5	-a2

• B．-

  6	-a5

• C．

  6	-a5

• D．

  6	a5

Answer 1

分析：利用指數(shù)冪的運算性質(zhì)即可得出．

解答：解：原式=a

1

3

•a

1

2

=a

1

3

+

1

2

=a

5

6

=

6	a5

．
故選D．

點評：熟練掌握指數(shù)冪的運算性質(zhì)是解題的關(guān)鍵．