with intial conditions show that S and P satisfy a conservation law given by S+P = c, for some constant c, and find the value of c. Hence determine I know that if you add the two equations you get a 0, is that what c equals?
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From and subtracting, . We also have S+ P= c for constant c, differentiating both sides, we have . So subtracting the second equation from the first, we have from which it follows that P(t) is a constant.
Sorry I have written out the equation wrong, I have now corrected it, also I dont understand how you got a minus, after differentiating both sides s+p = c.?
Originally Posted by Tweety with intial conditions show that S and P satisfy a conservation law given by S+P = c, for some constant c, and find the value of c. Hence determine I know that if you add the two equations you get a 0, is that what c equals? The first equation should have a minus infront of it
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