Theory of Intelligence
11TH•Mathematics•Matrices And Determinants•Exercise 4.1

Key idea

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Key idea

  • Matrix addition/subtraction is entry-wise:
(A±B)ij=aij±bij(A\pm B)_{ij}=a_{ij}\pm b_{ij}
  • Parentheses matter in grouped expressions like (A−B)−C(A-B)-C and A−(B−C)A-(B-C).

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