Question: Use chain rule to express d e l w d e l t as function of r and t , if w = f (

Use chain rule to express delwdelt as function of r and t, if w=f(x,y,z)=x2+y2+z2,x=rsint,y=rcost and z=rt2. Simplify your answer!
Use chain rule to express d e l w d e l t as

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