Business I / Matrix Addition
Practice question · Match the pairs

Match each symbol to its meaning.

  • aija_{ij}
  • m×nm \times n
  • A+BA + B
  • kAkA
  • Every entry multiplied by the scalar kk
  • Dimension: rows by columns
  • Entry in row ii, column jj
  • Entry-by-entry sum of equal-shaped tables
Hints
  1. Separate the symbols for shape from the symbols for operation.
  2. One symbol locates a single entry by its two indices.
Show the answer
  • aija_{ij} → Entry in row ii, column jj
  • m×nm \times n → Dimension: rows by columns
  • A+BA + B → Entry-by-entry sum of equal-shaped tables
  • kAkA → Every entry multiplied by the scalar kk
Why

Four symbols carry the whole lesson: position, shape, sum, and scale.

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