X increases Y + Z times per time unit:
X = X + (time * (Y + Z) )
The value of Z is constant Z = 1, value of Y starts at Y = 2.0 and is decaying at speed of 0.5 per time unit.
Is it possible to use equation to predicate the value of X after N time units, witch the assumption that Y (growth rate) could have reached zero somewhere in mid of time-frame?
Example: time T = 6
0 - growth = 1 + 2.0
1 - growth = 1 + 1.5
2 - growth = 1 + 1.0
3 - growth = 1 + 0.5
4 - growth = 1
5 - growth = 1
6 - growth = 1
Is it possible to show it with math equation?