Cho (f:mathop Rnolimits^3 to mathop Rnolimits^3) ,  Tập V tất cả ((mathop xnolimits_1 ,mathop xnolimits_2 ,mathop xnolimits_3 ))(f(mathop xnolimits_1 ,mathop xnolimits_2 ,mathop xnolimits_3 ) = (mathop xnolimits_1 + mathop xnolimits_2 + mathop xnolimits_3 ,mathop xnolimits_1 + mathop xnolimits_2 + mathop xnolimits_3 ,mathop xnolimits_1 – mathop xnolimits_2 – mathop xnolimits_3 )) thỏa (f(mathop xnolimits_1 ,mathop xnolimits_2 ,mathop xnolimits_3 )) =0 là:

A. (V = left{ {(mathop xnolimits_1 ,mathop xnolimits_2 ,mathop xnolimits_3 )/mathop xnolimits_1 = mathop xnolimits_2 = mathop xnolimits_3 = 0} right})

B. (V = left{ {(mathop xnolimits_1 ,mathop xnolimits_2 ,mathop xnolimits_3 )/mathop xnolimits_1 = 0,mathop xnolimits_2 = – mathop xnolimits_3 ,mathop xnolimits_3 in R} right})

C. (V = left{ {(mathop xnolimits_1 ,mathop xnolimits_2 ,mathop xnolimits_3 )/mathop xnolimits_1 = 3mathop xnolimits_3 ,mathop xnolimits_2 = 3mathop xnolimits_3 ,mathop xnolimits_3 in R} right})

D. (V = left{ {(mathop xnolimits_1 ,mathop xnolimits_2 ,mathop xnolimits_3 )/mathop xnolimits_1 = 3mathop xnolimits_3 + 1,mathop xnolimits_2 = 3mathop xnolimits_3 ,mathop xnolimits_3 in R} right})

Hướng dẫn

Chọn B là đáp án đúng