x^{15}-1的如下5个因式，哪两个的最大公因式不是常数: (1)x-1.(2)x^2+x+1.(3)x^4+x^3+x^2+x+1. (4)x^{10}+x^5+1(5)x^{12}+x^9+x^6+x^3+1.

x^{15}-1的如下5个因式，哪两个的最大公因式不是常数:(1)x-1.(2)x^2+x+1.(3)x^4+x^3+x^2+x+1.(4)x^{10}+x^5+1(5)x^{12}+x^9+x^6+x^3+1.

x^{15}-1的如下5个因式，哪两个的最大公因式不是常数: (1) x-1. (2) x^2+x+1. (3)x^4+x^3+x^3+x^2+x+1. (4) x^{10}+x^5+1 (5) x^{12}+x^9+x^6+x^3+1.

求函数[img=148x49]17da6537a5eee98.png[/img]的导数； ( ) A: 1/(x^2*(2/x^2 + 1)) B: -1/(x^2*(2/x^2 + 1)) C: (x^2*(2/x^2 + 1)) D: -1/(x^2*(2/x^2 + 1))+2/x^2 + 1

【单选题】对任意实数x 1 , y 1 , x 2 , y 2 , x 1 < x 2 , y 1 < y 2 , 分布函数P{x 1 <X≤x 2 , y 1 <Y≤y 2 }=? A. F(x 2 , y 2 )+ F(x 1 , y 1 )+ F(x 1 , y 2 )+ F(x 2 , y 1 ) B. F(x 2 , y 2 )- F(x 1 , y 1 )+ F(x 1 , y 2 )- F(x 2 , y 1 ) C. F(x 2 , y 2 )+ F(x 1 , y 1 )- F(x 1 , y 2 )- F(x 2 , y 1 ) D. F(x 2 , y 2 )- F(x 1 , y 1 )- F(x 1 , y 2 )+ F(x 2 , y 1 )

积分[img=136x52]1803d6afd4e6f95.png[/img]的计算程序和结果是 A: clearsyms xy=1/x^2/sqrt(x^2-1)int(y,x,-2,-1)3^(1/2)/2 B: clearsyms xint(1/x^2/sqrt(x^2-1),x,-2,-1)3^(1/2)/2 C: clearsyms xint(1/x/sqrt(x^2-1),x,-2,-1)-pi/3 D: clearsyms xint(1/x/sqrt(x^2-1),x,-2,-1)3^(1/2)/2 E: clearsyms xint(1/x^2*sqrt(x^2-1),x,-2,-1)log(3^(1/2) + 2) - 3^(1/2)/2

若\( \int {f(x)dx = {x^2} + C} \)，则\( \int {xf(1 - {x^2})dx = } \)( ) A: \( 2{(1 - {x^2})^2} + C \) B: \( - {1 \over 2}{(1 - {x^2})^2} + C \) C: \( {1 \over 2}{(1 - {x^2})^2} + C \) D: \( - 2{(1 - {x^2})^2} + C \)

已知\( y = \ln (1 + {x^2}) \)，则\( y' \)为( ). A: \( { { 2x} \over {1 + {x^2}}} \) B: \( {x \over {1 + {x^2}}} \) C: \( {1 \over {1 + {x^2}}} \) D: \( { { {x^2}} \over {1 + {x^2}}} \)

函数\(y = {\left( {\arcsin x} \right)^2}\)的导数为（ ）. A: \(2\arcsin x{1 \over {\sqrt {1 - {x^2}} }}\) B: \( - 2\arcsin x{1 \over {\sqrt {1 - {x^2}} }}\) C: \(2\arcsin x{1 \over {\sqrt {1 + {x^2}} }}\) D: \( - 2\arcsin x{1 \over {\sqrt {1 + {x^2}} }}\)

不等式4 A: {X|-2≤X＜-1或＜X≤} B: {X|-2≤X≤-1或＜X≤} C: {X|-2≤X≤-1或≤X≤} D: {X|-2＜X＜-1或≤X≤}