计算下列函数定积分,图上共四道题

1个回答

  • (3):

    =[1/3X3-1/3X-(3)] {(X=2)-(X=1)}

    =2.625-0

    =2.625

    (9):

    x=[0,1]时

    =X-1/2X2 {(X=1)-(X=0)}

    =1/2

    x=[1,3]

    =1/2X2-X {(X=3)-(X=1)}

    =3/2-(-1/2)

    =2

    所以结果为1/2+2=5/2

    (12)

    X=[-1,0]时

    F(X)=1/2X2;

    A1=F(0)-F(-1)=-1/2

    X=[0,1]

    F(X)=1/3X3;

    A2=F(1)-F(0)=1

    所以:A=A1+A2=1/2

    1.6.3

    F(X)=X2+KX;

    由题可知F(1)-F(0)=2

    所以 1+k-0=2

    k=-1