z(x+y)p + z(x-y)q = x2 + y2
string is stretched and fastened
to two points
l
cm apart. Motion is started by displacing the string into the form of the curve
l
x
l
x
y
2
cos
3
2sin
and then releasing it from this position at time
t 0.
Do not use the
symbol
l
but its actual value should be used in all of your calculations (steps). Find the
displacement function
y(x,t).
If a wet sheet in a dryer losses its moisture at a rate proportional to its moisture content, and losses half of its moisture during the first 10 minutes, when it will be practically dry? Say when will it have lost 99% of its moisture.
y(x+y)dx + (x+2y-1) dy = 0
p= (z+qy)2 how to solve it by Jacobi 's method
dx/dt=x-y
dy/dt=x+3y
y'''+3y''+3y'+y=0
z= xy+f(x^2+y^2+z^2)
Solve the differential equation
xdx+ydy= a^2(xdy-ydx)/x^2+ y^2
Solve du/dt =DT/