1.

The expansion of f(x, y) = ex ln(1 + y), is

A. f(x,y) = y + xy <sup>y<sup>2</sup></sup> <sub>2</sub> + .
B. f(x,y) = y xy + <sup>y<sup>2</sup></sup> <sub>2</sub> - .
C. f(x,y) = y + x <sup>y<sup>2</sup></sup> <sub>2</sub> + ..
D. f(x,y) = x + y <sup>x<sup>2</sup></sup> <sub>2</sub> + ..
Answer» B. f(x,y) = y xy + <sup>y<sup>2</sup></sup> <sub>2</sub> - .


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