Sequences

26

Contents:

A Number sequences [2.12]

B Algebraic rules for sequences [2.12]

C Geometric sequences [2.12]

D The difference method for sequences [2.12]

Opening problem

#endboxedheading

contains one square

contains 5 squares

(four 1 by 1 and one 2 by 2 ).

contains 1+4+9squares

(nine 1 by 1 , four 2 by 2 and one 3 by 3 ).

Things to think about:

a How many squares are contained in a 4 by 4 square, a 5 by 5 square and a 6 by 6 square?

b How many squares are contained in a 100 £ 100 square?

c Is there an easy way of finding the answer tob?

IGCSE01

cyan magenta yellow black

(^05255075950525507595)
100 100
(^05255075950525507595)
100 100
Y:\HAESE\IGCSE01\IG01_26\533IGCSE01_26.CDR Wednesday, 12 November 2008 9:10:49 AM PETER