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20 Qs

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ecuaciones diferenciales

ecuaciones diferenciales

Assessment

Quiz

Mathematics, Education

University

Hard

Created by

YEMINNA SANABRIA

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20 questions

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1.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

 dydx=x21y2\frac{\text{d}y}{\text{d}x}=\frac{x^2-1}{y^2}  

 y=(x33x )13y=\left(x^3-3x\ \right)^{\frac{1}{3}}  

 y=(x33x+c )13y=\left(x^3-3x+c\ \right)^{\frac{1}{3}}  

 y=(x33x+c )32y=\left(x^3-3x+c\ \right)^{\frac{3}{2}}  

 y=(x23x+c )12y=\left(x^2-3x+c\ \right)^{\frac{1}{2}}  

2.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

 dydx=(x2+y2)2xy\frac{\text{d}y}{\text{d}x}=-\frac{\left(x^2+y^2\right)}{2xy}  

 13ln(1+3z2)+c\frac{1}{3}\ln\left(1+3z^2\right)+c  

 13ln(1+3z2)-\frac{1}{3}\ln\left(1+3z^2\right)  

 13ln(1+3z2)+c-\frac{1}{3}\ln\left(1+3z^2\right)+c  

 13ln(1+2z2)+c\frac{1}{3}\ln\left(1+2z^2\right)+c  

3.

MULTIPLE CHOICE QUESTION

1 min • 1 pt


 (exy+1)dx+(ex1)dy      y(1)=1\left(e^xy+1\right)dx+\left(e^x-1\right)dy\ \ \ \ \ \ y\left(1\right)=1  

 y(x)=xex2y\left(x\right)=x\lceil e^x-2\rceil  

 y(x)=xex+1y\left(x\right)=x\lceil e^x+1\rceil  

 y(x)=ex1y\left(x\right)=\lceil e^x-1\rceil  

 y(x)=xex1y\left(x\right)=x\lceil e^x-1\rceil  

4.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

 y"+y=t(t4)u(t2)       y(0)=0       y´(0)=1y"+y=t-\left(t-4\right)u\left(t-2\right)\ \ \ \ \ \ \ y\left(0\right)=0\ \ \ \ \ \ \ y´\left(0\right)=1  

 y(t)=t[4+tsen(t2)2cos(t2)]u(t2)y\left(t\right)=t-\left[4+t-sen\left(t-2\right)-2\cos\left(t-2\right)\right]u\left(t-2\right)  

 y(t)=t+[2t+sen(t2)2cos(t2)]u(t2)y\left(t\right)=t+\left[2-t+sen\left(t-2\right)-2\cos\left(t-2\right)\right]u\left(t-2\right)  

 y(t)=t+[4t+sen(t2)2cos(t2)]u(t2)y\left(t\right)=t+\left[4-t+sen\left(t-2\right)-2\cos\left(t-2\right)\right]u\left(t-2\right)  

 y(t)=t+[4t+sen(t2)2cos(t2)]u(t+2)y\left(t\right)=t+\left[4-t+sen\left(t-2\right)-2\cos\left(t-2\right)\right]u\left(t+2\right)  

5.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

 y2dxxydy=x2ydyy^2dx-xydy=x^2ydy  

 y=1C(x+3)y=\frac{1}{C\left(x+3\right)}  

 y=xC(x+2)y=\frac{x}{C\left(x+2\right)}  

 y=x(x+1)+2+Cy=\frac{x}{\left(x+1\right)}+2+C  

 y=xC(x+1)y=\frac{x}{C\left(x+1\right)}  

6.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

 y´=tan2(x+y)y´=\tan^2\left(x+y\right)  

 (yx)+sen(x+y)=C1\left(y-x\right)+sen\left(x+y\right)=C_1  

 2(yx)+sen2(x+y)2\left(y-x\right)+sen2\left(x+y\right)  

 2(y+x)+sen2(xy)=C12\left(y+x\right)+sen2\left(x-y\right)=C_1  

 2(yx)+sen2(x+y)=C12\left(y-x\right)+sen2\left(x+y\right)=C_1  

7.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

 4y"+y=2     y(0)=0     y´(0)=124y"+y=-2\ \ \ \ \ y\left(0\right)=0\ \ \ \ \ y´\left(0\right)=\frac{1}{2}  

 s2a2(s2+a2)2\frac{s^2-a^2}{\left(s^2+a^2\right)^2}^{ }  

 s2a2(s2+a2)\frac{s^2-a^2}{\left(s^2+a^2\right)^{ }}  

 s2a2(s2a2)\frac{s^2-a^2}{\left(s^2-a^2\right)^{ }}  

 s2+a2(s2a2)\frac{s^2+a^2}{\left(s^2-a^2\right)^{ }}  

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