The position of a moving car at time t is given by f(t)=at2+bt+c,t>0, where a,bandc are real numbers greater than 1. Then the average speed of the car over the time interval [t1,t2] is attained at the point:
Held on 6 Sept 2020 · Verified 6 Jul 2026.
2(t2−t1)
a(t2−t1)+b
2(t1+t2)
2a(t1+t2)+b
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