dy/dt = y + 2

y(0) = 3

find y(2)

It's mainly the combination of dy/dt and y in the equation that's causing my confusion. Does this mean that when I take the antiderivative, I need to substitute so that it is with respect to y?

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- Dec 9th 2008, 03:28 PMOvechkinHelp with exam prep
dy/dt = y + 2

y(0) = 3

find y(2)

It's mainly the combination of dy/dt and y in the equation that's causing my confusion. Does this mean that when I take the antiderivative, I need to substitute so that it is with respect to y? - Dec 9th 2008, 05:42 PMZiaris

then

after moving differentials and integrating. Taking the antiderivative,

which, after solving for y, leads to

Plugging in y(0)=3, and after solving for C, C = 5.

So our specific solution is . Feel free to verify this by differentiating and using initial conditions. Finding y(2),

.

(As a side note, go Ovie!)