Hi.(adsbygoogle = window.adsbygoogle || []).push({});

If I have a function f ( x , t ) = x - 6t with x ( t ) = t^{2}and I take the partial derivative of f with respect to x I get the answer 1 as t acts as a constant so its derivative is zero. But if I substitute t with x^{1/2}I get the answer 1 - 3x^{-1/2}which is obviously different and wrong , I think ! So , why can't I do this method ?

Thanks

**Physics Forums | Science Articles, Homework Help, Discussion**

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# I Partial derivatives method

Have something to add?

Draft saved
Draft deleted

**Physics Forums | Science Articles, Homework Help, Discussion**