2-24 在某立方晶系的铜的X射线粉末相中,观察到的衍射角θ有下列关系:-|||-sinθ1:sinθ2····sinθ5-|||-=sqrt (3):sqrt (4):sqrt (8):sqrt (11):sqrt (12):sqrt (16):sqrt (19):sqrt (20)-|||-试确定对应于这些衍射角的晶面的衍射面指数。

若sin2α=(sqrt(5))/(5)，sin（β-α）=(sqrt(10))/(10)，且α∈[(π)/(4)，π]，β∈[π，(3π)/(2)]，则α+β

求极限 lim (sin sqrt (x+1)-sin sqrt (x)).

(4) lim _(xarrow 0)dfrac (sin x-tan x)((sqrt [3]{1+{x)^2}-1)(sqrt (1+sin x)-1)}

lim _(xarrow 0)dfrac (sin x-tan x)((sqrt [3]{1+{x)^2}-1)(sqrt (1+sin x)-1)}= __

int sqrt (x)sin sqrt (x)dx; ;

[题目] lim _(xarrow 0)dfrac (sin x-tan x)((sqrt [3]{1+{x)^2}-1)(sqrt (1+sin x)-1)}

(10) lim _(xarrow 0)dfrac (tan x-sin x)((sqrt [3]{1+{x)^2}-1)(sqrt (1+sin x)-1)}

1.求下列函数的自然定义域:-|||-(1) =sqrt (3x+2);-|||-(3) =dfrac (1)(x)-sqrt (1-{x)^2};-|||-(

求下列极限：lim _(xarrow 0)dfrac (sin x-tan x)((sqrt [3]{1+{x)^2}-1)(sqrt (1+sin x)-1)

下列复数① sqrt[4](6)(cos (pi)/(8)+i sin (pi)/(8));② sqrt[4](6)(cos (pi)/(8)-i sin (p