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Byju's Answer
Standard X
Mathematics
Common Difference
If the number...
Question
If the numbers
x
+
3
,
2
x
+
1
and
x
−
7
are in A.P., find the value of
x
.
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Solution
Since
x
+
3
,
2
x
+
1
and
x
−
7
are in A.P., thus,
(
x
+
3
)
+
(
x
−
7
)
=
2
(
2
x
+
1
)
2
x
−
4
=
4
x
+
2
⇒
2
x
=
−
6
⇒
x
=
−
6
2
=
−
3
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