int-(pi/3)^(pi/3) (x^3cosx)/sin^2xdx= (A) 0 (B) 1 (C) -1 (D) none of t... 01:12 The range of f(x)=sin^(-1)(sqrt(x^2+x+1))i s (0,pi/2) (b) (0,pi/3) ... 04:14 The value of int0^(pi/2) (dx)/(1+tan^3 x) is (a) 0 (b) 1 (c) pi/...
13.下列定积分等于2的是 A.∫_0^22xdx B ∫_0^2(1/2x+1)dx C C.∫_0^21dx∫_1^21/(2x)dx 23.下列定积分等于2的是 ( ) A. $$ \int _ { 0 } ^ { 2 } $$2xdx B.$$ \int _ { 0 } ^ { 2 } ( \frac { 1 } { 2 } x + 1 ) d x $$ C.$$ \...
5.C$$ \int _ { 0 } ^ { 2 } 2 x d x = x ^ { 2 } | _ { 0 } ^ { 2 } = 4 ; $$ $$ \int _ { 0 } ^ { 2 } ( \frac { 1 } { 2 } x + 1 ) d x = ( \frac { 1 } { 4 } x ^ { 2 } + x ) | _ { 0 } ^ { 2 } = 3 ; $$...
{ 3 } $$ $$ b = \int _ { 0 } ^ { 2 } x ^ { 3 } d x = \frac { 1 } { 4 } x ^ { 4 } | _ { 0 } ^ { 2 } = 4 , c = \int _ { 0 } ^ { 2 } \sin x d x $$ $$ = ( - \cos x ) | _ { 0 } ^ { 2 } = 1 - \cos ...
2设C为曲线{x=cost−−−−√y=sint−−−−√,0⩽t⩽π2,则∫ cx2ydy−y2xdx=()A. 12 ∫π20dtB. ∫π20(cos2t−sin2t)dtC. ∫π20[costsint−−−−√−sintcost]dtD. ∫π20costsint−−−−√⋅dt2sint−−−−√−∫π20sintcost−−...
$$ \int _ { 1 } ^ { 2 } \frac { 1 } { 2 x } $$dx 23.下列定积分等于2的是 A.∫_0^22xdx B ∫_0^2(1/2x+1)dx C C.∫_0^21dx∫_1^21/(2x)dx 反馈 收藏
2设C为曲线{x=cost−−−−√y=sint−−−−√,0⩽t⩽π2,则∫ cx2ydy−y2xdx=()A. 12 ∫π20dtB. ∫π20(cos2t−sin2t)dtC. ∫π20[costsint−−−−√−sintcost]dtD. ∫π20costsint−−−−√⋅dt2sint−−−−√−∫π20sintcost−−...