In the Previous Two Problems, Using $u _ { i j }$

question 21

Multiple Choice

In the previous two problems, using $u _ { i j }$ to denote the value of $u$ at the $i , j$ point, the equations for the values of the unknown function at the interior points are Select all that apply.

• A) \(- 4 u _ { 11 } + u _ { 21 } + u _ { 12 } = 0\)
• B) \(- 4 u _ { 22 } + u _ { 21 } + u _ { 12 } = - \sqrt { 3 }\)
• C) \(- 4 u _ { 22 } + u _ { 21 } + u _ { 12 } = - \sqrt { 3 } / 2\)
• D) \(- 4 u _ { 12 } + u _ { 11 } + u _ { 22 } = - \sqrt { 3 } / 2\)
• E) \(- 4 u _ { 21 } + u _ { 11 } + u _ { 22 } = - \sqrt { 3 } / 2\)

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