Question

計(jì)算(3x

1

2

y

1

4

)(-2x

3

4

y

1

2

)÷(6x

3

4

y

3

4

)．

Answer 1

分析：利用指數(shù)冪的運(yùn)算性質(zhì)即可得出．

解答：解：原式=

3×(-2)

6

•x

1

2

+

3

4

-

3

4

•y

1

4

+

1

2

-

3

4

=-

x

．

點(diǎn)評(píng)：熟練掌握指數(shù)冪的運(yùn)算性質(zhì)是解題的關(guān)鍵．