These are the first four diagrams of a sequence. The diagrams are made from white dots and black dots. Write an expression, in terms of $$$n$$$, for the number of white dots in Diagram $$$n$$$. .............................................

Mathematics

IGCSE&ALevel

CAIE

Exam No：0580_w20_qp_41 Year：2020 Question No：7(b)

Answer:

$n^{2}$

Knowledge points:

E2.7.1 Continue a given number sequence.

E2.7.2 Recognise patterns in sequences including the term to term rule and relationships between different sequences. (Subscript notation may be used.)

E2.7.3 Find and use the nth term of sequences. (Linear, quadratic, cubic and exponential sequences and simple combinations of these.)

Solution:

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These are the first four diagrams of a sequence. The diagrams are made from white dots and black dots. Write an expression, in terms of $$\(n\)$$, for the number of white dots in Diagram $$\(n\)$$. .............................................

Answer:

Knowledge points:

Solution:

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