东财在线21春经济数学第三套作业（5~7章）题目
经济数学第三套作业（5~7章）1.[单选题]微分方程2ydy-dx=0的通解为（ ）。
A.<p><img height="29" alt="" width="56" src="https://classroom.edufe.com.cn/TKGL/userfiles/image/766a.bmp" /></p>
B.<p><img height="41" alt="" width="89" src="https://classroom.edufe.com.cn/TKGL/userfiles/image/766b.bmp" /></p>
C.<p><img height="43" alt="" width="99" src="https://classroom.edufe.com.cn/TKGL/userfiles/image/766c.bmp" /></p>
D.<p><img height="27" alt="" width="66" src="https://classroom.edufe.com.cn/TKGL/userfiles/image/766d.bmp" /></p>
答:——A——
2.[单选题]<p><img height="58" width="136" alt="" src="https://classroom.edufe.com.cn/TKGL/userfiles/image/741.bmp" /></p>
A.<p><img height="58" width="77" alt="" src="https://classroom.edufe.com.cn/TKGL/userfiles/image/741a.bmp" /></p>
B.<p><img height="76" width="119" alt="" src="https://classroom.edufe.com.cn/TKGL/userfiles/image/741b.bmp" /></p>
C.<p><img height="41" width="42" alt="" src="https://classroom.edufe.com.cn/TKGL/userfiles/image/741c.bmp" /></p>
D.<p><img height="66" width="83" alt="" src="https://classroom.edufe.com.cn/TKGL/userfiles/image/741d.bmp" /></p>
答:——B——
3.[单选题]∫cotx(cotx-cscx)dx=（ ）。
A.cotx-x+cscx+c
B.-cotx-x+cscx+c
C.cotx-x-cscx+c
D.-cotx-x-cscx+c
答:——B——
4.[单选题]<p><img height="49" width="182" alt="" src="https://classroom.edufe.com.cn/TKGL/userfiles/image/740.bmp"/>（）。</p>
A.<p><img height="33" width="36" alt="" src="https://classroom.edufe.com.cn/TKGL/userfiles/image/740a.bmp"/></p>
B.<p><img height="47" width="58" alt="" src="https://classroom.edufe.com.cn/TKGL/userfiles/image/740b.bmp"/></p>
C.<p><img height="22" width="39" alt="" src="https://classroom.edufe.com.cn/TKGL/userfiles/image/740c.bmp"/></p>
D.<p><img height="31" width="50" alt="" src="https://classroom.edufe.com.cn/TKGL/userfiles/image/740d.bmp"/></p>
答:————
5.[单选题]<p><img height="35" width="84" alt="" src="https://classroom.edufe.com.cn/TKGL/userfiles/image/715.bmp" /></p>
A.<p><img height="32" width="104" alt="" src="https://classroom.edufe.com.cn/TKGL/userfiles/image/715a.bmp" /></p>
B.<p><img height="36" width="133" alt="" src="https://classroom.edufe.com.cn/TKGL/userfiles/image/715b.bmp" /></p>
C.<p><img height="27" width="59" alt="" src="https://classroom.edufe.com.cn/TKGL/userfiles/image/715c.bmp" /></p>
D.<p><img height="35" width="103" alt="" src="https://classroom.edufe.com.cn/TKGL/userfiles/image/715d.bmp" /></p>
答:————
6.[单选题]下列广义积分中收敛的是（ ）。<br>
A.<p><img height="38" alt="" width="89" src="https://classroom.edufe.com.cn/TKGL/userfiles/image/A(1).png" /></p>
B.<p><img height="38" alt="" width="72" src="https://classroom.edufe.com.cn/TKGL/userfiles/image/B.png" /></p>
C.<p><img height="47" alt="" width="86" src="https://classroom.edufe.com.cn/TKGL/userfiles/image/C.png" /></p>
D.<p><img height="46" alt="" width="82" src="https://classroom.edufe.com.cn/TKGL/userfiles/image/D.png" /></p>
答:————
7.[单选题]<p><img height="40" width="234" alt="" src="https://classroom.edufe.com.cn/TKGL/userfiles/image/749.bmp" /></p>
A.（1/2，-1）
B.（-7/2，1）
C.（7/2，-1）
D.（1/2，1）
答:————
8.[单选题]下列微分方程中可分离变量的是（ ）。
A.<p><img height="43" alt="" width="67" src="https://classroom.edufe.com.cn/TKGL/userfiles/image/762a.bmp" /></p>
B.<p><img height="55" alt="" width="166" src="https://classroom.edufe.com.cn/TKGL/userfiles/image/762b.bmp" /></p>
C.<p><img height="72" alt="" width="150" src="https://classroom.edufe.com.cn/TKGL/userfiles/image/762c.bmp" /></p>
D.<p><img height="28" alt="" width="77" src="https://classroom.edufe.com.cn/TKGL/userfiles/image/762d.bmp" /></p>
答:————
9.[单选题]<p><img height="40" width="156" alt="" src="https://classroom.edufe.com.cn/TKGL/userfiles/image/725.bmp"/>（）。</p>
A.0
B.-1
C.1
D.1/2
答:————
10.[单选题]过点（1，3）且切线斜率为2X的曲线方程Y=Y（X）应满足的关系式是（ ）。
A.<p><img height="24" alt="" width="59" src="https://classroom.edufe.com.cn/TKGL/userfiles/image/708a.bmp" /></p>
B.<p><img height="20" alt="" width="42" src="https://classroom.edufe.com.cn/TKGL/userfiles/image/708b.bmp" /></p>
C.<p><img height="28" alt="" width="127" src="https://classroom.edufe.com.cn/TKGL/userfiles/image/708c.bmp" /></p>
D.<p><img height="35" alt="" width="155" src="https://classroom.edufe.com.cn/TKGL/userfiles/image/708d.bmp" /></p>
答:————
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