differential equations

Question

Hi, can somebody help me to solve these differential equations.

 

1. D_a*(e^x+sqrt(a))/sinx

 

2. D[e^2xcos(3x)]

 

3. D*1/sqrt(1+x²)

 

4. m(t)= In (t/t₀)²

 

5. du(t)/dt, when u(t)= u sin²(ωt+φ)

 

 

Answer 1

Hi Thomas,

 

Unfortunately, none of these are differential equations. Items 1, 2, 3, and 5 don't contain an equals sign, and are therefore not equations. Item 4 is an equation, but m(t) is not defined. It is not clear what you are being asked to do in any of these problems.

 

Marty