​A.若 (int )_(a)^bf(x)dx=0, () 则在[a,b]上 f(x)=0B.若 (int )_(a)^bf(x)dx=0, () 则在[a,b]上 f(x)=0C.若 (int )_(a)^bf(x)dx=0, () 则在[a,b]上 f(x)=0D.若 (int )_(a)^bf(x)dx=0, () 则在[a,b]上 f(x)=0

设函数f(x)在[a,b]上可积,则(int )_(a)^bf(x)dx=A.(int )_(a)^bf(x)dx=B.(int )_(a)^bf(x)dx=C

()-|||-A) |(int )_(a)^bf(x)dx|geqslant (int )_(a)^b|f(x)|dx-|||-B |(int )_(a)^bf

5、单选 下列叙述不正确的是 -|||-A ) 若 (int )_(a)^bf(x)dx=0, 则在[a,b]上 f(x)=0-|||-B 若f(x)在[a,b

4.判断题 int_(a)^bf(x)dx+int_(b)^af(x)dx=0 （ ）A. 对B. 错

( )2. (int )_(a)^bf(x)dx=f(xi )(b-a) ( )3.若f(x)+g(x)在[a,b]上可积,则f(x)与g(x)均在[a,b]上

(4)若 (int )_(0)^1f(x)dx=agt 0, 则 (int )_(0)^1dfrac (1)(sqrt {x)}f(sqrt (x))dx=()

设函数f(x)在区间[a,b]上连续，且int_(a)^bf(x)dx=0，同时f(x)≥0，那么下列哪项一定成立?A. f(x)≡0在[a,b]上B. f(x

(B) (int )_(-1)^1f(x)dxlt 0.-|||-(C) (int )_(-1)^0f(x)dxgt (int )_(0)^1f(x)dx. (

(B) (int )_(-1)^1f(x)dxlt 0.-|||-(C) (int )_(-1)^0f(x)dxgt (int )_(0)^1f(x)dx. (

[题目]-|||-若 int f(x)dx=F(x)+C, 则 int f(2x-3)dx= __ .