For seconds a particle moves with velocity meters per second

MATHEMATICS · Subjective · AP · Calculus AB · Contextual Applications of Differentiation · Contextual Applications of Differentiation

Problem

For

0 \le t \le 6

seconds a particle moves with velocity

v(t) = (t - 1)(t - 4)

meters per second. Identify the subinterval(s) of

[0,6]

on which the particle is speeding up. Express your answer using interval notation.