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Class VI
Class VII
Class VIII
Class IX
Class X
CBSE Grade X - Arthimetic Progressions
Question
1
1.
Find the sum of the following A.P. series
(
3
x
+
2
y
)
,
(
−
4
x
+
6
y
)
,
(
−
11
x
+
10
y
)
. . .
to
7
terms
(
−
80
x
+
68
y
)
(
−
134
x
+
84
y
)
(
−
94
x
+
76
y
)
(
−
140
x
+
80
y
)
(
−
126
x
+
98
y
)
Question
2
2.
Given
t
n
=
27
, n =
9
,
S
n
=
135
, find a
6
0
3
4
2
Question
3
3.
The
t
19
of an A.P. is
79
8
and the
t
8
is
35
8
.
Find
t
17
.
71
6
73
8
69
8
71
8
71
10
Question
4
4.
How many terms of the A.P.
3
8
,
7
8
,
11
8
,
. . .
are needed to
make the sum
105
8
?
4
7
8
9
6
Question
5
5.
Insert
4
arithmetic means between
8
and
28
.
13
,
18
,
23
,
28
11
,
14
,
17
,
20
10
,
12
,
14
,
16
14
,
20
,
26
,
32
12
,
16
,
20
,
24
Question
6
6.
If there are n arithmetic means between a and b, the common difference d =
(
b
−
a
)
(
n
+
1
)
(
n
−
1
)
(
a
+
b
)
(
a
−
b
)
(
n
+
1
)
(
a
+
b
)
(
n
+
1
)
(
b
−
a
)
(
n
−
1
)
Question
7
7.
Find the next
4
terms of the following A.P.
(
a
−
4
b
)
,
(
−
7
a
+
3
b
)
,
(
−
15
a
+
10
b
)
,
. . .
(
−
14
a
+
6
b
)
,
(
−
22
a
+
13
b
)
,
(
−
30
a
+
20
b
)
,
(
−
38
a
+
27
b
)
(
−
23
a
+
17
b
)
,
(
−
31
a
+
24
b
)
,
(
−
39
a
+
31
b
)
,
(
−
47
a
+
38
b
)
(
−
22
a
+
13
b
)
,
(
−
30
a
+
20
b
)
,
(
−
38
a
+
27
b
)
,
(
−
46
a
+
34
b
)
(
−
31
a
+
24
b
)
,
(
−
39
a
+
31
b
)
,
(
−
47
a
+
38
b
)
,
(
−
55
a
+
45
b
)
(
−
24
a
+
21
b
)
,
(
−
32
a
+
28
b
)
,
(
−
40
a
+
35
b
)
,
(
−
48
a
+
42
b
)
Question
8
8.
Insert
3
arithmetic means between
1
5
and
7
10
.
11
30
,
8
15
,
7
10
23
40
,
19
20
,
53
40
3
10
,
2
5
,
1
2
13
40
,
9
20
,
23
40
3
40
,
(
-1
20
)
,
(
-7
40
)
Question
9
9.
Given
t
n
=
141
, n =
18
,
S
n
=
1314
, find d
7
9
8
10
5
Question
10
10.
Find
S
10
of the A.P.
2
,
8
,
14
,
. . .
=
289
288
292
290
291
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