Question
Determine the $t$ intervals on which the curve is concave downward or concave upward.$$x=2+t^{2}, \quad y=t^{2}+t^{3}$$
Step 1
We have $$\frac{dx}{dt} = 2t$$ and $$\frac{dy}{dt} = 2t + 3t^{2}.$$ Show more…
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