00:01
There is a question, let's say that a model for tumor growth is given by gompertz equation dv by dt equal to a ln b minus ln v into v, where a and v are positive constants and v is the volume of the tumor measured in millimeter cube.
00:21
Family of solution as a function of time.
00:25
So, this is a differential equation and i will be separating its variables dv by ln b minus ln v into v equal to a dt.
00:38
Now, i will be integrating both sides.
00:43
Now, to integrate it, i will be substituting in this, let ln v equal to t differentiating both sides 1 by v dv equal to dt.
00:57
Right side will be as it is.
00:59
After substitution, it will become this is 1 by v dv, this will become dt.
01:12
So, one more thing i could do as ln b, i would have just assumed this to be equal to t as its differentiation is 0.
01:22
So, everything would look like the same.
01:26
This is 1 by t dt equal to this is simply a t.
01:40
Another thing i need to take another variable as t is already there.
01:47
So, let us assume this to be u 1 by u du equal to t plus c a t plus c.
01:59
So, this is ln u equal to a t plus c...