Math Problem Statement

変数変換を用いて、t=x2+y2t=x2+y2 と置き換えると、 g(t)=sin⁡(t)+tg(t)=sin(t)+t

Solution

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Math Problem Analysis

Mathematical Concepts

Partial differentiation
Hessian matrix
Critical points

Formulas

Partial derivative formulas
Hessian determinant formula

Theorems

Second derivative test

Suitable Grade Level

Advanced undergraduate level