1.

THE_APPROXIMATE_VALUE_OF_FUNCTION_F(X_+_‚ÂÀ√≠¬¨‚Ä¢X,_Y_+_‚ÂÀ√≠¬¨‚Ä¢Y)_IS?$#

A. f + <sup>∂f</sup>⁄<sub>∂x</sub> dx + <sup>∂f</sup>⁄<sub>∂y</sub> dy
B. <sup>∂f</sup>⁄<sub>∂x</sub> dx + <sup>∂f</sup>⁄<sub>∂y</sub> dy
C. f – <sup>∂f</sup>⁄<sub>∂x</sub> dx + <sup>∂f</sup>⁄<sub>∂y</sub> dy
D. <sup>∂f</sup>⁄<sub>∂x</sub> dx – <sup>∂f</sup>⁄<sub>∂y</sub> dy
Answer» B. <sup>‚Äö√Ñ√∂‚àö‚Ć‚àö√°f</sup>‚Äö√Ñ√∂‚àö√ñ‚àö√´<sub>‚Äö√Ñ√∂‚àö‚Ć‚àö√°x</sub> dx + <sup>‚Äö√Ñ√∂‚àö‚Ć‚àö√°f</sup>‚Äö√Ñ√∂‚àö√ñ‚àö√´<sub>‚Äö√Ñ√∂‚àö‚Ć‚àö√°y</sub> dy


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