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Mathematics
Mathematics
Problem
For
−
3
≤
t
≤
3
-3\le t\le3
−
3
≤
t
≤
3
, the velocity of a particle is
v
(
t
)
=
(
t
−
1
)
2
(
t
+
2
)
v(t)=(t-1)^{2}(t+2)
v
(
t
)
=
(
t
−
1
)
2
(
t
+
2
)
meters per second. How many distinct times in this interval does the particle change direction? a) 3 b) 0 c) 2 d) 1
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