X=3t^2+2t ..find instantaneous speed at t=4sec
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V = dx/dt
V = d(3t²+2t)/dt
V = 6t+2
therefore, at t = 4s
V = 6(4)+2= 26m/s
V = d(3t²+2t)/dt
V = 6t+2
therefore, at t = 4s
V = 6(4)+2= 26m/s
Answered by
0
Instantaneous speed = dx/dt = 3t + 2
t= 4s
instantaneous speed, dv = 3t + 2 = 14 m/s
akifahjh19:
There is a slight change in the answer.
dx/dt = 6t+2= 26 m/s
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