考點(diǎn):對(duì)數(shù)的運(yùn)算性質(zhì),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:(Ⅰ)化帶分?jǐn)?shù)為假分?jǐn)?shù),化0指數(shù)冪為1,然后直接利用有理指數(shù)冪的運(yùn)算性質(zhì)化簡(jiǎn)求值;
(Ⅱ)直接利用對(duì)數(shù)的運(yùn)算性質(zhì)化簡(jiǎn)求值.
解答:
解:(Ⅰ)
(2)+0.2-2-π0+()- =
[()2]+()-2-1+(3-3)- =
()3+25-1+3=
30=
;
(Ⅱ)
log3(9×272)+log26-lo3+log43×log316=
log3[32×(33)2]+(log23+log22)-lo3+log43×log342=
log3[32×36]+log22+(log43)×2(log34)=
log338+1+2=8(log
33)+1+2
=8+1+2
=11.
點(diǎn)評(píng):本題考查了有理指數(shù)冪的化簡(jiǎn)與求值,考查了對(duì)數(shù)的運(yùn)算性質(zhì),是基礎(chǔ)的計(jì)算題.