求< img src="https://s3.cn-north-1.amazonaws.com.cn/qingshuxuetang/examination/imgUplod/1495007933154c9ce0d08a33f421aadd051d865de66b7image149.png" >( )
A
0
B
1
C

D

出自:延安大学经济数学(专升本)1