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Gilbert Strang, Calculus, 3rd edition (Wellesley-Cambridge Press; MIT OpenCourseWare RES.18-001) §13.3 Tangent Planes and Linear Approximations, #26 · Multivariable Calculus · Partial derivatives

Solve the equations … and … for … and

Solve the equations $P = - 2 Q + 40$ and $P = s Q + t$ for $P$ and $Q$ . Then find $\partial P / \partial s$ and $\partial P / \partial t$ explicitly. At the same $s, t, P, Q$ check $50/3$ and $1/3$ .

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Gilbert Strang, Calculus, 3rd edition (Wellesley-Cambridge Press; MIT OpenCourseWare RES.18-001) · §13.3 Tangent Planes and Linear Approximations, #26

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