A particle moves along a straight line with equation of motion s = f(t), Find the velocity and speed when t=4?

Question

f(t) = t -1 - t

the above equation is not right the real equation is y= t^(-1) - t

Answer 1

If f(t) = t - 1 - t = 1, then velocity and speed are 0 ALWAYS. If you mean something else, please try to appreciate that in mathematics, you must say what you mean and mean what you say. If you want to hide behind, "You know what I meant to say," get out of mathematics before your ego gets shattered,