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Question

In the LU decomposition of the matrix,

| 2 2 |
| 4 9 |

if the diagonal elements of U are both 1, then the lower diagonal entry l22 of L is

a.

4

b.

5

c.

6

d.

7

Answer: (b).5

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Q. In the LU decomposition of the matrix, | 2 2 | | 4 9 | if the diagonal elements of U are both 1, then the lower diagonal entry l22 of L is

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