A particle moves along a straight line. Its displacement, s metres from the fixed point O time t is given by at time t is given by [math]s=2t^3-5t^2+4t[/math]. Find[br][i]Suatu zarah bergerak di sepanjang satu garis lurus. Sesarannya,s meter, dari titik tetap O pada masa t saat diberi oleh [math]s=2t^3-5t^2+4t[/math][/i].[i] Cari[/i][br][br]a) the instantaneous velocity, in [math]ms^{-1}[/math], of the particle when t=2,[br] [i]halaju seketika zarah, dalam [math]ms^{-1}[/math], apabila t=2,[/i]

b) the values of t, in seconds, when the particle stops instantaneously,[br] [i]nilai-nilai t, dalam saat, apabila zarah itu berhenti seketika,[/i][br]

c) the range of values of t, in seconds, when the car moves to the right.[br][i] julat nilai t, dalam saat, apabila zarah itu bergerak ke kanan[/i]