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Multivariable CalculusEasyThe Chain Rule & Implicit Differentiation

The Chain Rule & Implicit Differentiation · Easy problem

Suppose w=f(x,y)w = f(x,y), where x=g(s,t)x = g(s,t) and y=h(s,t)y = h(s,t). Which formula gives ∂w∂t\dfrac{\partial w}{\partial t}?