考點(diǎn):實(shí)數(shù)的運(yùn)算,平方根,立方根
專題:
分析:(1)分別根據(jù)0指數(shù)冪、負(fù)整數(shù)指數(shù)冪的計(jì)算法則、數(shù)的開方法則計(jì)算出各數(shù),再根據(jù)實(shí)數(shù)混合運(yùn)算的法則進(jìn)行計(jì)算即可;
(2)根據(jù)絕對(duì)值的性質(zhì)進(jìn)行解答即可;
(3)、(4)根據(jù)數(shù)的開方法則求出x的值即可.
解答:解:(1)原式=
+2-2+1
=
;
(2)去絕對(duì)值符號(hào)得,x-
=10或x-
=-10,
解得x=10+
或x=-10+
;
(3)移項(xiàng)得,36(x-3)
2=25,
方程兩邊同時(shí)除以36得,(x-3)
2=
,
解得x-3=±
=±
,即x
1=
,x
2=
;
(4)移項(xiàng)得,(5x+1)
3=-216,
兩邊開立方得,5x+1=6,
解得x=1.
點(diǎn)評(píng):本題考查的是實(shí)數(shù)的運(yùn)算,熟知0指數(shù)冪、負(fù)整數(shù)指數(shù)冪的計(jì)算法則、數(shù)的開方法則是解答此題的關(guān)鍵.