精选问答
(2014•淄博一模)如图所示,曲线y=x2-1,x=2,x=0,y=0围成的阴影部分的面积为(  )A.∫20|x2−1|dxB.|∫20(x2−1)dx|C.∫20(x2−1)dxD.∫10(x2−1)dx+∫21(1−x2)dx

2019-04-29

(2014•淄博一模)如图所示,曲线y=x2-1,x=2,x=0,y=0围成的阴影部分的面积为(  )


A.
2
0
|x2−1|dx

B.|
2
0
(x2−1)dx|

C.
2
0
(x2−1)dx

D.
1
0
(x2−1)dx+
2
1
(1−x2)dx
优质解答
由题意S=
1
0
(1−x2)dx+
2
1
(x2−1)dx
=
2
0
|x2−1|dx

故选A.
由题意S=
1
0
(1−x2)dx+
2
1
(x2−1)dx
=
2
0
|x2−1|dx

故选A.
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