solve the ODE (3x2+4xy-6)dy+(6xy+2y2-5)=0
A body of unknown temperature is placed in a refrigerator at a constant temperature of 0∘F, If after 20 minutes the temperature of the body is 40∘F, and after 40 minutes the temperature of the body is 20∘F, find the initial temperature of the body.
Find the complete integral of pq=1 by charpit's method
A body of unknown temperature is placed in a refrigerator at a constant temperature of 0∘F, If after 20 minutes the temperature of the body is 40∘F, and after 40 minutes the temperature of the body is 20∘F, find the initial temperature of the body.
Homogeneous differential equation
1. (xy^2)dx-(x^3+y^3)dy=0
2. (x^2+y^2)dx+xydy=0
3. (y^2-x^2)dx+2xydy=0
4. (3x+2y)dx-2xdy=0
a capacitor C=0.01F in series with a resistor R=20 ohm is charged from a batter E=10V . assuming that initially the capacitor is completely uncharged , determine the charge Q(t) and the current i(t) at any time t.
2dy/dx+y=x^2
y(2x-y+1)dx + x(3x-4y+3)dy=0
a.) 2y′′′−7y′′+12y′+8y=0
b.) y"-2y'+5y=e^xsinx
c.) y′' + y = 2xsinx