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A curve in the xy-plane is parametricall...

A curve in the xy-plane is parametrically given by `x=t+t^3a n dy=t^2,w h e r et in R` is the parameter. For what value(s) of `t` is `(dy)/(dx)=1/2?` `1/3` b. `2` c. `3` d. `1`

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