Question

помогите с д/з
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Answer 1

$1)\; P=2(x+y)=200\; \to \; x+y=100\; \to \; y=100-x\\\\S=xy=x(100-x)=100x-x^2\\\\S'_{x}=100-2x=0\; \to x=50\\\\Znaki\; \; S'(x):\; \; +++(50)---\\\\x_{max}=50\\\\y=100-x=100-50=50\\\\S_{max}=50\cdot 50=2500$
2)  Аналогично