1. Math
2. Calculus
3. the answers to the math problems are from my textbook...

# Question: the answers to the math problems are from my textbook...

###### Question details

The answers to the math problems are from my textbook. I need help with getting to the answer.

1) dy/dx=e^3x+2y

answer: -3e^-2y = 2e^3x+c

2) csc y dx + sec^2 x dy = 0

answer: 4 cos y = 2x + sin 2x + c

3) (e^y+1)^2 e^-y dx + (e^x+1)^3 e^-x dy = 0

answer: (e^x + 1)^-2 + 2(e^y + 1)^-1 = c