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Byju's Answer
Standard VI
Mathematics
Addition of Fractions
What is the c...
Question
What is the common difference of an A.P. in which
a
21
−
a
7
=
84
?
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Solution
⇒
a
21
−
a
7
=
84
⇒
a
+
20
d
−
(
a
+
6
d
)
=
84
⇒
14
d
=
84
⇒
d
=
6
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