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Home > PC3 > Chapter 9 > Lesson 9.2.2 > Problem 9-117

9-117.

MATRIX DEFINITIONS, REVIEWED Homework Help ✎

  1. Write the and identity matrices.

    Recall that an identity matrix has s on the diagonal from upper left to lower right and s elsewhere.

  2. State the dimensions of each of the following matrices:
    i.     ii.     iii.

  3. In part (i) above, identify and .

    means the entry in the second row, first column.