Choose the model

Question

Cho hàm số z(x, y) = ln(x2 + y2) + 3sin(xy)

Tìm dz(0; 1)

Accepted Answer

<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:m="http://schemas.openxmlformats.org/officeDocument/2006/math"><mml:mn>3</mml:mn><mml:mi>d</mml:mi><mml:mi>x</mml:mi><mml:mo>+</mml:mo><mml:mi> </mml:mi><mml:mn>2</mml:mn><mml:mi> </mml:mi><mml:mi>d</mml:mi><mml:mi>y</mml:mi><mml:mo>;</mml:mo><mml:mi> </mml:mi><mml:mi> </mml:mi></mml:math>

Answer

5

Answer

-5

Answer

-3dx- 2 dy;