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Byju's Answer
Standard X
Mathematics
General Form of an AP
What is the c...
Question
What is the common difference of an A.P. in which
a
24
−
a
17
=
−
28
?
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Solution
General
n
t
h
term in AP,
a
n
=
a
+
(
n
−
1
)
d
a
=
first term,
d
=
common difference.
Given,
a
24
−
a
17
=
−
28
⇒
(
a
+
23
d
)
−
(
a
+
16
d
)
=
−
28
⇒
23
d
−
16
d
=
−
28
⇒
7
d
=
−
28
⇒
d
=
−
4
.
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