matching two expression

Hi, how to matching this two equation for define a and b
c(t):=2.47+0.0036t
c(t):=a+bt

23-Emerald IV

You have 2 unknowns, so you need 2 equations.

The best two equations in your case are:

a=2.47

b*t=0.0036*t

And have mathcad solve these simultaneously:

Success!
Luc

12-Amethyst

Hi. If c(t) is given, and you want to get a and b, can use the coeffs symbolic keyword, or evaluate c and c' at t=0.

Best regards.

Alvaro

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