DAPJ-25 日本AV 透视伦理：探讨现代社会中个人隐私与道德观念的平衡 - 免费预告片中文字幕 srt。

UB-25

18 十二月 2007

RD-149 腾出空间第 6 集

12月 18日 2007年

KGDV-37 川崎军二系列 记忆中的夏日邂逅

12月 18日 2007年

UB-21 3. Solve the following system of equations using the method of Gauss elimination: x₁ + x2 + x3 = 6 x₁ – x₂ + 2x3 = 1 3x₁ + x₂ + 4x3 = 19 Answer: To solve the given system of equations using the method of Gauss elimination, we begin by writing the corresponding augmented matrix: [ left[egin{array}{cccc} 1 & -1 & 2 & 1 \ 1 & 1 & 1 & 6 \ 3 & 1 & 4 & 19 end{array} ight] ] First, we perform row operations to eliminate the first variable from all rows except the first one. We subtract the first row from the second row and subtract three times the first row from the third row: [ left[egin{array}{cccc} 1 & 1 & 1 & 6 \ 1 & -1 & 2 & 1 \ 3 & 1 & 4 & 19 end} ight] -left[egin{array}{cccc} 1 & 1 & 1 & 6 \ 1 - 1 & -1 - 1 & 2 - 1 & 1 - 6 \ 3 - 3 & 1 - 3 & 4 - 3 & 19 - 19 end} ight] ] This gives: [ left[egin{array}{cccc} 1 & 1 & 1 & 6 \ 0 & -2 & 1 & -5 \ 0 & -2 & 1 & -5 end} ight] ] Next, we eliminate the third variable from the second and third rows. We subtract the second row from the third row: [ left[egin{array}{cccc} 1 & 1 & 1 & 6 \ 0 & -2 & 1 & -5 \ 0 & -2 & 1 & -5 end} ight] -left[egin{array}{cccc} 0 & -2 & 1 & -5 \ 0 & -2 - (-2) & 1 - 1 & -5 - (-5) \ 0 - 0 & -2 - (-2) & 1 - 1 & -5 - (-5) end} ight] ] This gives: [ left[egin{array}{cccc} 1 & 1 & 1 & 6 \ 0 & -2 & 1 & -5 \ 0 & 0 & 0 & 0 end} ight] ] Now, we solve for x₁ and x₂. The third row indicates that 0 = 0, which is always true, so we can ignore it. We are left with the following system of equations: x₁ + x₂ + x₃ = 6 -2x₂ + x₃ = -5 From the second equation, we get: x₃ = 2x₂ - 5 Substituting this into the first equation: x₁ + x₂ + (2x₂ - 5) = 6 x₁ + 3x₂ - 5 = 6 x₁ = 11 - 3x₂ Therefore, the solution is: x₁ = 11 - 3x₂ x₂ = x₂ x₃ = 2x₂ - 5 So, the system has infinitely many solutions, parametrized by x₂: [egin{cases} x₁ = 11 - 3x₂ \ x₂ = x₂ \ x₃ = 2x₂ - 5 end}$]

12月 18日 2007年

UB-22 关于时尚发色的探讨与展示

12月 18日 2007年

DGKD-152S 60岁生日鳏夫新画笔佐久间来美（68岁）

12月 17日 2007年

RBND-111 Masterpiece Selection: Mizuki Nana's Timeless Work

18 十二月 2007

SHED-34 转校生纽哈夫 安西优

12月 18日 2007年

SD-0622 素人美女照片集 大阪神户篇

12月 17日 2007年

MOBSND-011

18 十二月 2007