考點(diǎn):根式與分?jǐn)?shù)指數(shù)冪的互化及其化簡(jiǎn)運(yùn)算,有理數(shù)指數(shù)冪的化簡(jiǎn)求值
專題:函數(shù)的性質(zhì)及應(yīng)用
分析:(1)直接利用有理數(shù)指數(shù)冪的化簡(jiǎn)求值,根式與分?jǐn)?shù)指數(shù)冪的互化及其化簡(jiǎn)運(yùn)算化簡(jiǎn)(-3
)
-+(0.002)
--9(
-2)
-1+3π
0-
求解即可.
(2)直接利用根式與分?jǐn)?shù)指數(shù)冪的互化及其化簡(jiǎn)運(yùn)算化簡(jiǎn)
+2
×
×
+
求解即可.
(3)代入x=
,n∈N
*,a>0且a≠1,于(x-
)化簡(jiǎn)求解即可.
解答:
解:(1)(-3
)
-+(0.002)
--9(
-2)
-1+3π
0-
=
+10
-9(
+2)+3-
+1
=
-(2)
+2
×
×
+
=2+
×
×
+
=2+6+
=8+
(3)已知x=
,n∈N
*,a>0且a≠1,
x-
=
-
=
-
=-
a-.
點(diǎn)評(píng):本題考查有理數(shù)指數(shù)冪的化簡(jiǎn)求值,根式與分?jǐn)?shù)指數(shù)冪的互化及其化簡(jiǎn)運(yùn)算,考查計(jì)算能力.