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Introduction
· In Core 1 you learn about Arithmetic Sequences,
where the pattern is based around an
addition/subtraction rule
· For example, a sequence with a common difference of
2 (5, 7, 9, 11...) is an Arithmetic Sequence
· This Chapter focuses on sequences where the pattern
is based around multiplication or division
· A sequence such as 2, 4, 8, 16, 32 is known as a
Geometric Sequence…read more

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Geometric Sequences and Series
You need to be able to spot patterns Example Questions
to work out the rule for a Geometric Calculate the common ratio for each of
Sequence the following sequences...
a) 3, 12, 48, 192
In any Geometric sequence, u1, u2, u3 ... un
b) 54, 18, 6, 2
Is the common ratio, and is the same for all
consecutive pairs
etc...
7A…read more

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Geometric Sequences and Series
You need to be able to spot patterns Example Questions
to work out the rule for a Geometric Calculate the common ratio for each of
Sequence the following sequences...
c) 5, x, 51.2
In any Geometric sequence, u1, u2, u3 ... un
Multiply by 5
Multiply by x
Is the common ratio, and is the same for all
consecutive pairs
Square root
etc...
7A…read more

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