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tmua.me Medium Set F Paper 2 · Q13

Paper 2Algebra

A particle moves along a straight line. At time tt seconds its coordinate, in metres, is

s(t)=t2−5t+4t,1≤t≤4.s(t)=\frac{t^2-5t+4}{t},\qquad 1\leq t\leq4.

What is its average speed, in metres per second, over the time from t=1t=1 to t=4t=4?

A00
B13\dfrac13
C12\dfrac12
D23\dfrac23
E34\dfrac34

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