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Suppose f(x,y) is a function for which ∇f(15,2) = <6, -3>. Suppose g(t) = f(t2-1, sqrt(t))....

Suppose f(x,y) is a function for which ∇f(15,2) = <6, -3>. Suppose g(t) = f(t2-1, sqrt(t)). Find g'(4).

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