Originally Posted by

**deragon999** Here a few questions and my answers where i have done. check means i want a yes or no as to my answer =P

Here goes:

Q1: 2xy(y')=y^2-9 x not=0

a) find steady state solution...

no answer..help

b) find the general solution:

y'=(y^2-9)/(2xy) ? check

c) Find the particular solution when y=5 and x=4

Is the answer 2/5 check

Q2: The half life of morphine in the human bloodstream is 3 hours.

(a) If initially there is 0.4 mg of morphine in the bloodstream, find an equation for the amount of morphine in the bloodstream at any time t.

M=morphine amount, t=time in hours

M=(cuberoot(0.5)^t)*)0.4 ? check

(b) When does the amount drop below 0.01 mg?

15.96 hours? check

Q3: Find a function f(x) such that the point (1, 2) is on the graph of y=f(x), the slope of the tangent line at (1, 2) is 3 and f''(x)=x-1

I got f(x)=(x^3)/6-(x^2)/2+3.5x-1/1/6 check please...(1/1/6 means 1 and 1 sixth)