Find d^2 y/d^2 x for y=3t^3+4t & x=6t^4+7t

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Homework Statement



Find the d^2 y /d^2 x for y= 3t^3+4t and x=6t^4+7t

I just made one up similar to what my teacher gave to do

The Attempt at a Solution



Dont know how to do it, i know i need 2nd derivatives but what then help i need please
 
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Well first off find \frac{dy}{dt} and \frac{dx}{dt} and then try go at it from there. Use your knowledge of parametric differentiation.
 
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