Analysis and Approaches for IBDP Maths Ebook 2 | Page 44

Your Practice Set – Analysis and Approaches for IBDP Mathematics
SUMMARY POINTs
� Row operations of a system with row R
i
:
1. Multiply the constant k to the row R
i
( kR
i
)
2. Add the row R
i
to the row
R ( Ri
� R )
3. Add the multiple of the row R
i
to the row
j
j
kR
R
j
(
i
Rj
� )
� Number of solutions of a system with the last row az � b after row operation:
1. The system has a unique solution if a � 0
2. The system has no solution if a � 0 and b � 0
3. The system has infinitely number of solutions if a � 0 and b � 0
Solutions of Chapter 3
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