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SS3: MATHEMATICS - 2ND TERM

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  1. Matrices I | Week 1
    6 Topics
  2. Matrices II | Week 2
    1 Topic
    |
    1 Quiz
  3. Commercial Arithmetic | Week 3
    7 Topics
    |
    1 Quiz
  4. Coordinate Geometry | Week 4
    8 Topics
    |
    1 Quiz
  5. Differentiation of Algebraic Expressions | Week 5 & 6
    7 Topics
  6. Application of Differentiation | Week 7
    4 Topics
    |
    1 Quiz
  7. Integration | Week 8
    8 Topics
    |
    1 Quiz



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A square matrix:

This is a matrix of order m × m. This simply means that number of rows equal to the number of columns.

\( \scriptsize \begin{pmatrix} 1 & 2 & 5 \\ 6 & 8 & 9 \\ 1 & 7 & 4\end{pmatrix} \)

This is a 3 × 3 matrix.

Diagonal matrix:

This is a square matrix with all elements zero except those on the leading diagonal.

\( \scriptsize \begin{pmatrix} 5 & 0 & 0 \\ 0 & 8 & 0 \\ 0 & 0 & 4 \end{pmatrix} \)

Unit matrix:

This is a diagonal matrix in which the elements on the leading diagonal are all unity.

\( \scriptsize \begin{pmatrix} 1 & 0 & 0 \\ 0 & 1 & 0 \\ 0 & 0 & 1 \end{pmatrix} \)

The unit matrix is denoted by I.

Null matrix:

A null matrix or simply zero matrix is one whose elements are all zero and is denoted by 0.

\( \scriptsize \begin{pmatrix} 0 & 0 & 0 \\ 0 & 0 & 0 \\ 0 & 0 & 0\end{pmatrix} \)

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