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Kebakaran mengakibatkan suhu pada daerah $D=\\{(x,y)|x^2+y^2\\leq \\var{a^2}\\}$ mengikuti fungsi $T(x,y)=\\dfrac{\\simplify{{b}*(x^2+y^2+4)}}{x^2+y^2+1}$ (dalam $^\\circ C$).

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Pernyataan berikut yang benar adalah \$$\\ldots\$$.

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