Question

can someone please check these questions as i'm not sure if they are right.

Answer 1

to find the tangent line of these two surfaces.

Answer 2

Q2) differential of P=8T/V, where v = 4L and T =400K


\[dP= \frac{ 8 }{ V } dT -\frac{ 8T }{V ^{2} }dV\]

Answer 3

\[dP(T,V) = \frac{ 8 }{ 4 }dT-\frac{ 8.3 }{ 4^{2}}\]