Sequences
-I
,Arithmetic
Sequences
1 2 358 Fibonacci
I
common
difference
-
258 I1 Arittanitie
2481632 Common ratio (Geomatic
Fundamentals
of sequences
Un The ni term. So us would
refer tothe
3 team
n The
positionof the
terminthe
sequence
y
A The
firstterms in a
sequence
d The
difference
between terms
1 team 2nd Term 3d Term ih Term
a a d
+
a 2d
+
a (n 1)d
+
-
, nth
of ArithmeticSequence
term
un
=
a
(n
+
-
1)d
memorise
Un 55-2n
=
u, 55-2
=
53
=
u 55
= -
4 -
5/
us 55
=
-
6 49
=
-
1 55-2n
=
In = 56
Ter
x 2828
n 56
=
=
, kz 5
=
a 2d
+
5
=
20 7d 20
48
=
a
+
=
5 -2d 20
=
-
7d
5d 15 =
d 3
=
a 6
+
5
=
a -
=
1
Un 3n-1
=
-
8, x2, 17x
-
8 d
+
x2
=
-8 2d +
17x
=
x
+ d 17x
=
+
x 8 17x
=
-
x"
2n -17x 8
+
0
=
22 8x xz
= =
-I
,Arithmetic
Sequences
1 2 358 Fibonacci
I
common
difference
-
258 I1 Arittanitie
2481632 Common ratio (Geomatic
Fundamentals
of sequences
Un The ni term. So us would
refer tothe
3 team
n The
positionof the
terminthe
sequence
y
A The
firstterms in a
sequence
d The
difference
between terms
1 team 2nd Term 3d Term ih Term
a a d
+
a 2d
+
a (n 1)d
+
-
, nth
of ArithmeticSequence
term
un
=
a
(n
+
-
1)d
memorise
Un 55-2n
=
u, 55-2
=
53
=
u 55
= -
4 -
5/
us 55
=
-
6 49
=
-
1 55-2n
=
In = 56
Ter
x 2828
n 56
=
=
, kz 5
=
a 2d
+
5
=
20 7d 20
48
=
a
+
=
5 -2d 20
=
-
7d
5d 15 =
d 3
=
a 6
+
5
=
a -
=
1
Un 3n-1
=
-
8, x2, 17x
-
8 d
+
x2
=
-8 2d +
17x
=
x
+ d 17x
=
+
x 8 17x
=
-
x"
2n -17x 8
+
0
=
22 8x xz
= =
