wiz-icon
MyQuestionIcon
MyQuestionIcon
1
You visited us 1 times! Enjoying our articles? Unlock Full Access!
Question

The solution of the differential equation xdyydx=(x2+y2)dx is?

A
yx2+y2=Cx2
No worries! We‘ve got your back. Try BYJU‘S free classes today!
B
y+x2+y2=Cx2
Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses
C
y+x2+y2+Cx2=0
No worries! We‘ve got your back. Try BYJU‘S free classes today!
D
None of the above
No worries! We‘ve got your back. Try BYJU‘S free classes today!
Open in App
Solution

The correct option is B y+x2+y2=Cx2
xdyydx=x2+y2dx
xdy=(y+x2+y2)dx
dydx=y+x2+y2x
It is homogeneous equation.
Put y=vxdydx=v+xdvdx
v+xdvdx=vx+x1+v2x=v+1+v21
xdvdx=1+v2
=dv1+v2=dxx
log(v+1+v2)=logx+logC
log(yx+x2+y2x)=logx+logC
log(y+x2+y2)logx=logx+logC
log(y+x2+y2)=log(x2C)
y+x2+y2=x2C.

flag
Suggest Corrections
thumbs-up
0
Join BYJU'S Learning Program
similar_icon
Related Videos
thumbnail
lock
Degree of a Differential Equation
MATHEMATICS
Watch in App
Join BYJU'S Learning Program
CrossIcon